diff --git a/docs/cli-reference/field-customization.md b/docs/cli-reference/field-customization.md
index 1c9dbc872..041685965 100644
--- a/docs/cli-reference/field-customization.md
+++ b/docs/cli-reference/field-customization.md
@@ -27,6 +27,7 @@
 | [`--use-inline-field-description`](#use-inline-field-description) | Add field descriptions as inline comments. |
 | [`--use-schema-description`](#use-schema-description) | Use schema description as class docstring. |
 | [`--use-serialization-alias`](#use-serialization-alias) | Use serialization_alias instead of alias for field aliasing ... |
+| [`--use-single-line-docstring`](#use-single-line-docstring) | Emit short docstrings on a single line. |
 | [`--use-title-as-name`](#use-title-as-name) | Use schema title as the generated class name. |
 
 ---
@@ -3527,6 +3528,84 @@ serializing to the original JSON property name.
 
 ---
 
+## `--use-single-line-docstring` {#use-single-line-docstring}
+
+Emit short docstrings on a single line.
+
+The `--use-single-line-docstring` flag formats docstrings that fit on one line
+as compact single-line docstrings while keeping the historical multi-line
+format as the default.
+
+**Related:** [`--use-field-description`](field-customization.md#use-field-description), [`--use-schema-description`](field-customization.md#use-schema-description)
+
+!!! tip "Usage"
+
+    ```bash
+    datamodel-codegen --input schema.json --use-field-description --use-single-line-docstring # (1)!
+    ```
+
+    1. :material-arrow-left: `--use-single-line-docstring` - the option documented here
+
+??? example "Examples"
+
+    **Input Schema:**
+
+    ```json
+    {
+      "$schema": "http://json-schema.org/draft-07/schema#",
+      "title": "Person",
+      "type": "object",
+      "properties": {
+        "firstName": {
+          "type": "string",
+          "description": "The person's first name."
+        },
+        "lastName": {
+          "type": ["string", "null"],
+          "description": "The person's last name."
+        },
+        "age": {
+          "description": "Age in years which must be equal to or greater than zero.",
+          "type": "integer",
+          "minimum": 0
+        },
+        "friends": {
+          "type": "array"
+        },
+        "comment": {
+          "type": "null"
+        }
+      }
+    }
+    ```
+
+    **Output:**
+
+    ```python
+    # generated by datamodel-codegen:
+    #   filename:  person.json
+    #   timestamp: 2019-07-26T00:00:00+00:00
+
+    from __future__ import annotations
+
+    from typing import Any
+
+    from pydantic import BaseModel, conint
+
+
+    class Person(BaseModel):
+        firstName: str | None = None
+        """The person's first name."""
+        lastName: str | None = None
+        """The person's last name."""
+        age: conint(ge=0) | None = None
+        """Age in years which must be equal to or greater than zero."""
+        friends: list[Any] | None = None
+        comment: None = None
+    ```
+
+---
+
 ## `--use-title-as-name` {#use-title-as-name}
 
 Use schema title as the generated class name.
diff --git a/docs/cli-reference/index.md b/docs/cli-reference/index.md
index d481179dc..8d9a9d951 100644
--- a/docs/cli-reference/index.md
+++ b/docs/cli-reference/index.md
@@ -10,7 +10,7 @@ This documentation is auto-generated from test cases.
 |----------|---------|-------------|
 | 📁 [Base Options](base-options.md) | 10 | Input/output configuration |
 | 🔧 [Typing Customization](typing-customization.md) | 29 | Type annotation and import behavior |
-| 🏷️ [Field Customization](field-customization.md) | 24 | Field naming and docstring behavior |
+| 🏷️ [Field Customization](field-customization.md) | 25 | Field naming and docstring behavior |
 | 🏗️ [Model Customization](model-customization.md) | 39 | Model generation behavior |
 | 🎨 [Template Customization](template-customization.md) | 21 | Output formatting and custom rendering |
 | 📘 [OpenAPI-only Options](openapi-only-options.md) | 7 | OpenAPI-specific features |
@@ -212,6 +212,7 @@ This documentation is auto-generated from test cases.
 - [`--use-schema-description`](field-customization.md#use-schema-description)
 - [`--use-serialization-alias`](field-customization.md#use-serialization-alias)
 - [`--use-serialize-as-any`](model-customization.md#use-serialize-as-any)
+- [`--use-single-line-docstring`](field-customization.md#use-single-line-docstring)
 - [`--use-specialized-enum`](typing-customization.md#use-specialized-enum)
 - [`--use-standard-collections`](typing-customization.md#use-standard-collections)
 - [`--use-standard-primitive-types`](typing-customization.md#use-standard-primitive-types)
diff --git a/docs/cli-reference/quick-reference.md b/docs/cli-reference/quick-reference.md
index 95acfb3d6..64c41f6e2 100644
--- a/docs/cli-reference/quick-reference.md
+++ b/docs/cli-reference/quick-reference.md
@@ -88,6 +88,7 @@ datamodel-codegen [OPTIONS]
 | [`--use-inline-field-description`](field-customization.md#use-inline-field-description) | Add field descriptions as inline comments. |
 | [`--use-schema-description`](field-customization.md#use-schema-description) | Use schema description as class docstring. |
 | [`--use-serialization-alias`](field-customization.md#use-serialization-alias) | Use serialization_alias instead of alias for field aliasing (Pydantic v2 only). |
+| [`--use-single-line-docstring`](field-customization.md#use-single-line-docstring) | Emit short docstrings on a single line. |
 | [`--use-title-as-name`](field-customization.md#use-title-as-name) | Use schema title as the generated class name. |
 
 ### 🏗️ Model Customization
@@ -352,6 +353,7 @@ All options sorted alphabetically:
 - [`--use-schema-description`](field-customization.md#use-schema-description) - Use schema description as class docstring.
 - [`--use-serialization-alias`](field-customization.md#use-serialization-alias) - Use serialization_alias instead of alias for field aliasing ...
 - [`--use-serialize-as-any`](model-customization.md#use-serialize-as-any) - Wrap fields with subtypes in Pydantic's SerializeAsAny.
+- [`--use-single-line-docstring`](field-customization.md#use-single-line-docstring) - Emit short docstrings on a single line.
 - [`--use-specialized-enum`](typing-customization.md#use-specialized-enum) - Generate StrEnum/IntEnum for string/integer enums (Python 3....
 - [`--use-standard-collections`](typing-customization.md#use-standard-collections) - Use built-in dict/list instead of typing.Dict/List.
 - [`--use-standard-primitive-types`](typing-customization.md#use-standard-primitive-types) - Use Python standard library types for string formats instead...
diff --git a/src/datamodel_code_generator/__init__.py b/src/datamodel_code_generator/__init__.py
index 131782028..11ec3ef5a 100644
--- a/src/datamodel_code_generator/__init__.py
+++ b/src/datamodel_code_generator/__init__.py
@@ -727,6 +727,7 @@ def get_header_and_first_line(csv_file: IO[str]) -> dict[str, Any]:
         "dataclass_arguments": dataclass_arguments,
         "defer_formatting": defer_formatting,
         "use_type_checking_imports": config.use_type_checking_imports,
+        "use_single_line_docstring": config.use_single_line_docstring,
         "enum_field_as_literal": (
             config.enum_field_as_literal
             if config.enum_field_as_literal is not None
diff --git a/src/datamodel_code_generator/__main__.py b/src/datamodel_code_generator/__main__.py
index e7225ea13..98e5f7bd0 100644
--- a/src/datamodel_code_generator/__main__.py
+++ b/src/datamodel_code_generator/__main__.py
@@ -453,6 +453,7 @@ def validate_class_name_affix_scope(cls, v: str | ClassNameAffixScope | None) ->
     use_field_description_example: bool = False
     use_attribute_docstrings: bool = False
     use_inline_field_description: bool = False
+    use_single_line_docstring: bool = False
     use_default_kwarg: bool = False
     reuse_model: bool = False
     reuse_scope: ReuseScope = ReuseScope.Module
@@ -906,6 +907,7 @@ def run_generate_from_config(  # noqa: PLR0913, PLR0917
         use_field_description_example=config.use_field_description_example,
         use_attribute_docstrings=config.use_attribute_docstrings,
         use_inline_field_description=config.use_inline_field_description,
+        use_single_line_docstring=config.use_single_line_docstring,
         use_default_kwarg=config.use_default_kwarg,
         reuse_model=config.reuse_model,
         reuse_scope=config.reuse_scope,
diff --git a/src/datamodel_code_generator/_types/generate_config_dict.py b/src/datamodel_code_generator/_types/generate_config_dict.py
index c0c278d10..f95200b1b 100644
--- a/src/datamodel_code_generator/_types/generate_config_dict.py
+++ b/src/datamodel_code_generator/_types/generate_config_dict.py
@@ -78,6 +78,7 @@ class GenerateConfigDict(TypedDict, closed=True):
     use_field_description_example: NotRequired[bool]
     use_attribute_docstrings: NotRequired[bool]
     use_inline_field_description: NotRequired[bool]
+    use_single_line_docstring: NotRequired[bool]
     use_default_kwarg: NotRequired[bool]
     reuse_model: NotRequired[bool]
     reuse_scope: NotRequired[ReuseScope]
diff --git a/src/datamodel_code_generator/_types/parser_config_dicts.py b/src/datamodel_code_generator/_types/parser_config_dicts.py
index c99912474..1665e4f0c 100644
--- a/src/datamodel_code_generator/_types/parser_config_dicts.py
+++ b/src/datamodel_code_generator/_types/parser_config_dicts.py
@@ -79,6 +79,7 @@ class ParserConfigDict(TypedDict):
     use_field_description_example: NotRequired[bool]
     use_attribute_docstrings: NotRequired[bool]
     use_inline_field_description: NotRequired[bool]
+    use_single_line_docstring: NotRequired[bool]
     use_default_kwarg: NotRequired[bool]
     reuse_model: NotRequired[bool]
     reuse_scope: NotRequired[ReuseScope | None]
diff --git a/src/datamodel_code_generator/arguments.py b/src/datamodel_code_generator/arguments.py
index 7c8f7a7a0..1bd3f5cc3 100644
--- a/src/datamodel_code_generator/arguments.py
+++ b/src/datamodel_code_generator/arguments.py
@@ -853,6 +853,12 @@ def start_section(self, heading: str | None) -> None:
     action="store_true",
     default=None,
 )
+field_options.add_argument(
+    "--use-single-line-docstring",
+    help="Use single-line docstrings when the content fits on one line",
+    action="store_true",
+    default=None,
+)
 field_options.add_argument(
     "--union-mode",
     help="Union mode for only pydantic v2 field",
diff --git a/src/datamodel_code_generator/cli_options.py b/src/datamodel_code_generator/cli_options.py
index ad64860d3..267f28f95 100644
--- a/src/datamodel_code_generator/cli_options.py
+++ b/src/datamodel_code_generator/cli_options.py
@@ -156,6 +156,7 @@ class CLIOptionMeta:
     "--use-inline-field-description": CLIOptionMeta(
         name="--use-inline-field-description", category=OptionCategory.FIELD
     ),
+    "--use-single-line-docstring": CLIOptionMeta(name="--use-single-line-docstring", category=OptionCategory.FIELD),
     "--field-constraints": CLIOptionMeta(name="--field-constraints", category=OptionCategory.FIELD),
     "--field-extra-keys": CLIOptionMeta(name="--field-extra-keys", category=OptionCategory.FIELD),
     "--field-extra-keys-without-x-prefix": CLIOptionMeta(
diff --git a/src/datamodel_code_generator/config.py b/src/datamodel_code_generator/config.py
index 4bd1ed9a3..5b82c4459 100644
--- a/src/datamodel_code_generator/config.py
+++ b/src/datamodel_code_generator/config.py
@@ -103,6 +103,7 @@ class GenerateConfig(BaseModel):
     use_field_description_example: bool = False
     use_attribute_docstrings: bool = False
     use_inline_field_description: bool = False
+    use_single_line_docstring: bool = False
     use_default_kwarg: bool = False
     reuse_model: bool = False
     reuse_scope: ReuseScope = ReuseScope.Module
@@ -242,6 +243,7 @@ class ParserConfig(BaseModel):
     use_field_description_example: bool = False
     use_attribute_docstrings: bool = False
     use_inline_field_description: bool = False
+    use_single_line_docstring: bool = False
     use_default_kwarg: bool = False
     reuse_model: bool = False
     reuse_scope: ReuseScope | None = None
diff --git a/src/datamodel_code_generator/model/base.py b/src/datamodel_code_generator/model/base.py
index 02eadbd61..a33233aca 100644
--- a/src/datamodel_code_generator/model/base.py
+++ b/src/datamodel_code_generator/model/base.py
@@ -66,6 +66,68 @@ def escape_docstring(value: str | None) -> str | None:
     return value.replace("\\", "\\\\").replace('"""', '\\"\\"\\"')
 
 
+def _ends_with_unescaped_quote(value: str) -> bool:
+    """Return whether *value* ends with a double quote that is not escaped."""
+    if not value.endswith('"'):
+        return False
+
+    backslash_count = 0
+    for char in reversed(value[:-1]):
+        if char != "\\":
+            break
+        backslash_count += 1
+    return backslash_count % 2 == 0
+
+
+def format_docstring(value: str | None, indent_spaces: int = 0, *, use_single_line_docstring: bool = False) -> str:
+    """Format *value* as a docstring as per PEP 257.
+
+    PEP 257 recommends that docstrings that can fit on one line should be formatted on a
+    single line, for consistency and readability. When use_single_line_docstring is
+    false, docstrings retain the historical multi-line formatting. It is assumed that
+    the opening triple-quotes are indented appropriately in the template. If it's a
+    multi-line docstring, each line including the closing triple-quotes will be indented
+    as per indent_spaces.
+
+    Args:
+        value: docstring text
+        indent_spaces: Spaces to indent for all lines after the opening triple-quotes
+        use_single_line_docstring: Use one-line docstrings when possible
+
+    Returns:
+        Empty string when `value` is falsy; otherwise the docstring block.
+    """
+    if value is None or not value.strip():
+        return ""
+
+    escaped = escape_docstring(value) or ""
+
+    if use_single_line_docstring and "\n" not in value and "\r" not in value:
+        if _ends_with_unescaped_quote(escaped):
+            escaped = f'{escaped[:-1]}\\"'
+
+        return f'"""{escaped}"""'
+
+    indent = max(indent_spaces, 0) * " "
+    if indent:
+        escaped = "\n".join(f"{indent}{line}" if line else "" for line in escaped.split("\n"))
+        return f'"""\n{escaped}\n{indent}"""'
+    return f'"""\n{escaped}\n"""'
+
+
+class _RenderedDataModelField:
+    """Proxy a field with a pre-rendered docstring for built-in templates."""
+
+    __slots__ = ("_field", "docstring")
+
+    def __init__(self, field: DataModelFieldBase, docstring: str) -> None:
+        self._field = field
+        self.docstring = docstring
+
+    def __getattr__(self, name: str) -> Any:
+        return getattr(self._field, name)
+
+
 ALL_MODEL: str = "#all#"
 GENERIC_BASE_CLASS_PATH: str = "#/__datamodel_code_generator__/generic_base_class__"
 GENERIC_BASE_CLASS_NAME: str = "__generic_base_class__"
@@ -358,6 +420,7 @@ def inline_field_docstring(self) -> str | None:
             if description is not None and "\n" not in description:
                 escaped = escape_docstring(description)
                 return f'"""{escaped}"""'
+
         return None
 
     @property
@@ -453,7 +516,8 @@ def _get_environment(template_subdir: Path, custom_template_dir: Path | None) ->
         loader=loader,
         autoescape=select_autoescape(["html", "xml"]),
     )
-    env.filters["escape_docstring"] = escape_docstring
+    env.filters["escape_docstring"] = escape_docstring  # For old custom templates
+    env.filters["format_docstring"] = format_docstring
     return env
 
 
@@ -486,7 +550,8 @@ def _get_environment_with_absolute_path(absolute_template_dir: Path, builtin_sub
         loader=ChoiceLoader(loaders),
         autoescape=select_autoescape(["html", "xml"]),
     )
-    env.filters["escape_docstring"] = escape_docstring
+    env.filters["escape_docstring"] = escape_docstring  # For old custom templates
+    env.filters["format_docstring"] = format_docstring
     return env
 
 
@@ -598,6 +663,9 @@ class DataModel(TemplateBase, Nullable, ABC):  # noqa: PLR0904
     SUPPORTS_FIELD_RENAMING: ClassVar[bool] = False
     SUPPORTS_KW_ONLY: ClassVar[bool] = False
     REQUIRES_RUNTIME_IMPORTS_WITH_RUFF_CHECK: ClassVar[bool] = False
+    DOCSTRING_INDENT: ClassVar[int] = 4
+    FIELD_DOCSTRING_INDENT: ClassVar[int] = 4
+    FORMAT_DESCRIPTION_AS_DOCSTRING: ClassVar[bool] = True
     has_forward_reference: bool = False
 
     def __init__(  # noqa: PLR0913
@@ -902,18 +970,46 @@ def set_reference_path(self, new_path: str) -> None:
 
     def render(self, *, class_name: str | None = None) -> str:
         """Render the model to a string using the template."""
+        use_custom_template = self.template_file_path.is_absolute()
         return self._render(
             class_name=class_name or self.class_name,
-            fields=self.fields,
+            fields=self.fields if use_custom_template else self.rendered_fields,
             decorators=self.decorators,
             base_class=self.base_class,
             methods=self.methods,
-            description=self.description,
+            description=self.description
+            if use_custom_template or not self.FORMAT_DESCRIPTION_AS_DOCSTRING
+            else self.rendered_description,
             dataclass_arguments=self.dataclass_arguments,
             path=self.path,
             **self.extra_template_data,
         )
 
+    @property
+    def use_single_line_docstring(self) -> bool:
+        """Whether single-line docstring formatting is enabled for this model."""
+        return bool(self.extra_template_data.get("use_single_line_docstring"))
+
+    def _format_docstring(self, value: str | None, indent_spaces: int) -> str:
+        return format_docstring(
+            value,
+            indent_spaces,
+            use_single_line_docstring=self.use_single_line_docstring,
+        )
+
+    @property
+    def rendered_description(self) -> str:
+        """Return the model description as a generated docstring literal."""
+        return self._format_docstring(self.description, self.DOCSTRING_INDENT)
+
+    @property
+    def rendered_fields(self) -> list[DataModelFieldBase | _RenderedDataModelField]:
+        """Return fields with docstrings prepared for built-in templates."""
+        return [
+            _RenderedDataModelField(field, self._format_docstring(field.docstring, self.FIELD_DOCSTRING_INDENT))
+            for field in self.fields
+        ]
+
 
 _rebuild_namespace = {"Union": Union, "DataModelFieldBase": DataModelFieldBase, "DataType": DataType}
 DataType.model_rebuild(_types_namespace=_rebuild_namespace)
diff --git a/src/datamodel_code_generator/model/pydantic_v2/root_model_type_alias.py b/src/datamodel_code_generator/model/pydantic_v2/root_model_type_alias.py
index 5674f69c4..97a5560c5 100644
--- a/src/datamodel_code_generator/model/pydantic_v2/root_model_type_alias.py
+++ b/src/datamodel_code_generator/model/pydantic_v2/root_model_type_alias.py
@@ -28,4 +28,6 @@ class RootModelTypeAlias(RootModel):
 
     TEMPLATE_FILE_PATH: ClassVar[str] = "pydantic_v2/RootModelTypeAlias.jinja2"
     IS_ALIAS: ClassVar[bool] = True
+    DOCSTRING_INDENT: ClassVar[int] = 0
+    FIELD_DOCSTRING_INDENT: ClassVar[int] = 0
     DEFAULT_IMPORTS: ClassVar[tuple[Import, ...]] = (IMPORT_ROOT_MODEL,)
diff --git a/src/datamodel_code_generator/model/template/Enum.jinja2 b/src/datamodel_code_generator/model/template/Enum.jinja2
index 09a8e2207..7da31a3a5 100644
--- a/src/datamodel_code_generator/model/template/Enum.jinja2
+++ b/src/datamodel_code_generator/model/template/Enum.jinja2
@@ -3,16 +3,12 @@
 {% endfor -%}
 class {{ class_name }}({{ base_class }}):
 {%- if description %}
-    """
-    {{ description | escape_docstring | indent(4) }}
-    """
+    {{ description }}
 {%- endif %}
 {%- for field in fields %}
     {{ field.name }} = {{ field.default }}
     {%- if field.docstring %}
-    """
-    {{ field.docstring | escape_docstring | indent(4) }}
-    """
+    {{ field.docstring }}
 {%- if field.use_inline_field_description and not loop.last %}
 
 {% endif %}
diff --git a/src/datamodel_code_generator/model/template/ScalarTypeAliasAnnotation.jinja2 b/src/datamodel_code_generator/model/template/ScalarTypeAliasAnnotation.jinja2
index a214eb596..adb65e94a 100644
--- a/src/datamodel_code_generator/model/template/ScalarTypeAliasAnnotation.jinja2
+++ b/src/datamodel_code_generator/model/template/ScalarTypeAliasAnnotation.jinja2
@@ -1,6 +1,4 @@
 {{ class_name }}: TypeAlias = {{ py_type }}
 {%- if description %}
-"""
 {{ description }}
-"""
 {%- endif %}
diff --git a/src/datamodel_code_generator/model/template/ScalarTypeAliasType.jinja2 b/src/datamodel_code_generator/model/template/ScalarTypeAliasType.jinja2
index ce30cf157..b319aa87a 100644
--- a/src/datamodel_code_generator/model/template/ScalarTypeAliasType.jinja2
+++ b/src/datamodel_code_generator/model/template/ScalarTypeAliasType.jinja2
@@ -1,6 +1,4 @@
 {{ class_name }} = TypeAliasType("{{ class_name }}", {{ py_type }})
 {%- if description %}
-"""
 {{ description }}
-"""
 {%- endif %}
diff --git a/src/datamodel_code_generator/model/template/ScalarTypeStatement.jinja2 b/src/datamodel_code_generator/model/template/ScalarTypeStatement.jinja2
index 3299ab6d8..81d26151f 100644
--- a/src/datamodel_code_generator/model/template/ScalarTypeStatement.jinja2
+++ b/src/datamodel_code_generator/model/template/ScalarTypeStatement.jinja2
@@ -1,6 +1,4 @@
 type {{ class_name }} = {{ py_type }}
 {%- if description %}
-"""
 {{ description }}
-"""
-{%- endif %}
\ No newline at end of file
+{%- endif %}
diff --git a/src/datamodel_code_generator/model/template/TypeAliasAnnotation.jinja2 b/src/datamodel_code_generator/model/template/TypeAliasAnnotation.jinja2
index 85265d402..151828768 100644
--- a/src/datamodel_code_generator/model/template/TypeAliasAnnotation.jinja2
+++ b/src/datamodel_code_generator/model/template/TypeAliasAnnotation.jinja2
@@ -11,19 +11,13 @@ Annotated[{{ _field.type_hint }}, {{ _field.field }}]
 {%- if fields %}
 {{ class_name }}: TypeAlias = {{ get_type_annotation(fields[0]) }}{% if comment is defined %}  # {{ comment }}{% endif %}
 {%- if description %}
-"""
-{{ description | escape_docstring | indent(0) }}
-"""
+{{ description }}
 {%- elif fields[0].docstring %}
-"""
-{{ fields[0].docstring | escape_docstring | indent(0) }}
-"""
+{{ fields[0].docstring }}
 {%- endif %}
 {%- else %}
 {{ class_name }}: TypeAlias = {{ base_class }}{% if comment is defined %}  # {{ comment }}{% endif %}
 {%- if description %}
-"""
-{{ description | escape_docstring | indent(0) }}
-"""
+{{ description }}
 {%- endif %}
 {%- endif %}
diff --git a/src/datamodel_code_generator/model/template/TypeAliasType.jinja2 b/src/datamodel_code_generator/model/template/TypeAliasType.jinja2
index bd19b2a3f..111dca508 100644
--- a/src/datamodel_code_generator/model/template/TypeAliasType.jinja2
+++ b/src/datamodel_code_generator/model/template/TypeAliasType.jinja2
@@ -11,19 +11,13 @@ Annotated[{{ _field.type_hint }}, {{ _field.field }}]
 {%- if fields %}
 {{ class_name }} = TypeAliasType("{{ class_name }}", {{ get_type_annotation(fields[0]) }}){% if comment is defined %}  # {{ comment }}{% endif %}
 {%- if description %}
-"""
-{{ description | escape_docstring | indent(0) }}
-"""
+{{ description }}
 {%- elif fields[0].docstring %}
-"""
-{{ fields[0].docstring | escape_docstring | indent(0) }}
-"""
+{{ fields[0].docstring }}
 {%- endif %}
 {%- else %}
 {{ class_name }} = TypeAliasType("{{ class_name }}", {{ base_class }}){% if comment is defined %}  # {{ comment }}{% endif %}
 {%- if description %}
-"""
-{{ description | escape_docstring | indent(0) }}
-"""
+{{ description }}
 {%- endif %}
 {%- endif %}
diff --git a/src/datamodel_code_generator/model/template/TypeStatement.jinja2 b/src/datamodel_code_generator/model/template/TypeStatement.jinja2
index ce03c241b..f1ea7d675 100644
--- a/src/datamodel_code_generator/model/template/TypeStatement.jinja2
+++ b/src/datamodel_code_generator/model/template/TypeStatement.jinja2
@@ -11,19 +11,13 @@ Annotated[{{ _field.type_hint }}, {{ _field.field }}]
 {%- if fields %}
 type {{ class_name }} = {{ get_type_annotation(fields[0]) }}{% if comment is defined %}  # {{ comment }}{% endif %}
 {%- if description %}
-"""
-{{ description | escape_docstring | indent(0) }}
-"""
+{{ description }}
 {%- elif fields[0].docstring %}
-"""
-{{ fields[0].docstring | escape_docstring | indent(0) }}
-"""
+{{ fields[0].docstring }}
 {%- endif %}
 {%- else %}
 type {{ class_name }} = {{ base_class }}{% if comment is defined %}  # {{ comment }}{% endif %}
 {%- if description %}
-"""
-{{ description | escape_docstring | indent(0) }}
-"""
+{{ description }}
+{%- endif %}
 {%- endif %}
-{%- endif %}
\ No newline at end of file
diff --git a/src/datamodel_code_generator/model/template/TypedDictClass.jinja2 b/src/datamodel_code_generator/model/template/TypedDictClass.jinja2
index 7087b924c..f0c76ae82 100644
--- a/src/datamodel_code_generator/model/template/TypedDictClass.jinja2
+++ b/src/datamodel_code_generator/model/template/TypedDictClass.jinja2
@@ -1,8 +1,6 @@
 class {{ class_name }}({{ base_class }}):
 {%- if description %}
-    """
-    {{ description | escape_docstring | indent(4) }}
-    """
+    {{ description }}
 {%- endif %}
 {%- if not fields and not description %}
     pass
@@ -10,9 +8,7 @@ class {{ class_name }}({{ base_class }}):
 {%- for field in fields %}
     {{ field.name }}: {{ field.type_hint }}
     {%- if field.docstring %}
-    """
-    {{ field.docstring | escape_docstring | indent(4) }}
-    """
+    {{ field.docstring }}
 {%- if field.use_inline_field_description and not loop.last %}
 
 {% endif %}
diff --git a/src/datamodel_code_generator/model/template/TypedDictFunction.jinja2 b/src/datamodel_code_generator/model/template/TypedDictFunction.jinja2
index 6ced50efd..82545f4e0 100644
--- a/src/datamodel_code_generator/model/template/TypedDictFunction.jinja2
+++ b/src/datamodel_code_generator/model/template/TypedDictFunction.jinja2
@@ -1,15 +1,11 @@
 {%- if description %}
-"""
-{{ description | escape_docstring | indent(4) }}
-"""
+    {{ description }}
 {%- endif %}
 {{ class_name }} = TypedDict('{{ class_name }}', {
 {%- for field in all_fields %}
     '{{ field.key }}': {{ field.type_hint }},
     {%- if field.docstring %}
-    """
-    {{ field.docstring | escape_docstring | indent(4) }}
-    """
+    {{ field.docstring }}
 {%- if field.use_inline_field_description and not loop.last %}
 
 {% endif %}
diff --git a/src/datamodel_code_generator/model/template/dataclass.jinja2 b/src/datamodel_code_generator/model/template/dataclass.jinja2
index 46b9ddab6..0460dcaa2 100644
--- a/src/datamodel_code_generator/model/template/dataclass.jinja2
+++ b/src/datamodel_code_generator/model/template/dataclass.jinja2
@@ -18,9 +18,7 @@ class {{ class_name }}({{ base_class }}):
 class {{ class_name }}:
 {%- endif %}
 {%- if description %}
-    """
-    {{ description | escape_docstring | indent(4) }}
-    """
+    {{ description }}
 {%- endif %}
 {%- if not fields and not description %}
     pass
@@ -35,9 +33,7 @@ class {{ class_name }}:
     {%- endif -%}
     {%- endif %}
     {%- if field.docstring %}
-    """
-    {{ field.docstring | escape_docstring | indent(4) }}
-    """
+    {{ field.docstring }}
 {%- if field.use_inline_field_description and not loop.last %}
 
 {% endif %}
diff --git a/src/datamodel_code_generator/model/template/msgspec.jinja2 b/src/datamodel_code_generator/model/template/msgspec.jinja2
index 0b712b297..f1765b13f 100644
--- a/src/datamodel_code_generator/model/template/msgspec.jinja2
+++ b/src/datamodel_code_generator/model/template/msgspec.jinja2
@@ -9,9 +9,7 @@ class {{ class_name }}({{ base_class }}{%- for key, value in (base_class_kwargs|
 class {{ class_name }}:
 {%- endif %}
 {%- if description %}
-    """
-    {{ description | escape_docstring | indent(4) }}
-    """
+    {{ description }}
 {%- endif %}
 {%- set ns = namespace(has_rendered_field=false) -%}
 {%- for field in fields -%}
@@ -37,9 +35,7 @@ class {{ class_name }}:
 
 
     {%- if not field.extras.get('is_classvar') and field.docstring %}
-    """
-    {{ field.docstring | escape_docstring | indent(4) }}
-    """
+    {{ field.docstring }}
 {%- if field.use_inline_field_description and not loop.last %}
 
 {% endif %}
diff --git a/src/datamodel_code_generator/model/template/pydantic_v2/BaseModel.jinja2 b/src/datamodel_code_generator/model/template/pydantic_v2/BaseModel.jinja2
index 0d812ff60..ae102e07b 100644
--- a/src/datamodel_code_generator/model/template/pydantic_v2/BaseModel.jinja2
+++ b/src/datamodel_code_generator/model/template/pydantic_v2/BaseModel.jinja2
@@ -3,9 +3,7 @@
 {% endfor -%}
 class {{ class_name }}({{ base_class }}):{% if comment is defined %}  # {{ comment }}{% endif %}
 {%- if description %}
-    """
-    {{ description | escape_docstring | indent(4) }}
-    """
+    {{ description }}
 {%- endif %}
 {%- if not fields and not description and not config and not class_body_lines %}
     pass
@@ -32,9 +30,7 @@ class {{ class_name }}({{ base_class }}):{% if comment is defined %}  # {{ comme
     {%- endif -%}
     {%- endif %}
     {%- if field.docstring %}
-    """
-    {{ field.docstring | escape_docstring | indent(4) }}
-    """
+    {{ field.docstring }}
 {%- if field.use_inline_field_description and not loop.last %}
 
 {% endif %}
diff --git a/src/datamodel_code_generator/model/template/pydantic_v2/RootModel.jinja2 b/src/datamodel_code_generator/model/template/pydantic_v2/RootModel.jinja2
index af5de33b7..446e8d122 100644
--- a/src/datamodel_code_generator/model/template/pydantic_v2/RootModel.jinja2
+++ b/src/datamodel_code_generator/model/template/pydantic_v2/RootModel.jinja2
@@ -18,9 +18,7 @@
 {%- set use_base_type = config and config.regex_engine -%}
 class {{ class_name }}({{ base_class }}{%- if fields -%}[{{get_type_hint(fields, use_base_type)}}]{%- endif -%}):{% if comment is defined %}  # {{ comment }}{% endif %}
 {%- if description %}
-    """
-    {{ description | escape_docstring | indent(4) }}
-    """
+    {{ description }}
 {%- endif %}
 {%- if config %}
 {%- filter indent(4) %}
@@ -47,9 +45,7 @@ class {{ class_name }}({{ base_class }}{%- if fields -%}[{{get_type_hint(fields,
     {%- endif -%}
     {%- endif %}
     {%- if field.docstring %}
-    """
-    {{ field.docstring | escape_docstring | indent(4) }}
-    """
+    {{ field.docstring }}
     {%- elif field.inline_field_docstring %}
     {{ field.inline_field_docstring }}
 
diff --git a/src/datamodel_code_generator/model/template/pydantic_v2/RootModelTypeAlias.jinja2 b/src/datamodel_code_generator/model/template/pydantic_v2/RootModelTypeAlias.jinja2
index 401d83f23..95be3b71f 100644
--- a/src/datamodel_code_generator/model/template/pydantic_v2/RootModelTypeAlias.jinja2
+++ b/src/datamodel_code_generator/model/template/pydantic_v2/RootModelTypeAlias.jinja2
@@ -12,11 +12,7 @@
 {%- set use_base_type = config and config.regex_engine -%}
 {{ class_name }} = RootModel[{{get_type_hint(fields, use_base_type)}}]{% if comment is defined %}  # {{ comment }}{% endif %}
 {%- if description %}
-"""
 {{ description }}
-"""
 {%- elif fields and fields[0].docstring %}
-"""
 {{ fields[0].docstring }}
-"""
 {%- endif %}
diff --git a/src/datamodel_code_generator/model/template/pydantic_v2/dataclass.jinja2 b/src/datamodel_code_generator/model/template/pydantic_v2/dataclass.jinja2
index 00b12e628..2ce858bf8 100644
--- a/src/datamodel_code_generator/model/template/pydantic_v2/dataclass.jinja2
+++ b/src/datamodel_code_generator/model/template/pydantic_v2/dataclass.jinja2
@@ -25,9 +25,7 @@ class {{ class_name }}({{ base_class }}):
 class {{ class_name }}:
 {%- endif %}
 {%- if description %}
-    """
-    {{ description | escape_docstring | indent(4) }}
-    """
+    {{ description }}
 {%- endif %}
 {%- if not fields and not description %}
     pass
@@ -46,9 +44,7 @@ class {{ class_name }}:
     {%- endif -%}
     {%- endif %}
     {%- if field.docstring %}
-    """
-    {{ field.docstring | escape_docstring | indent(4) }}
-    """
+    {{ field.docstring }}
 {%- if field.use_inline_field_description and not loop.last %}
 
 {% endif %}
diff --git a/src/datamodel_code_generator/model/type_alias.py b/src/datamodel_code_generator/model/type_alias.py
index 319b127cf..ff7e10360 100644
--- a/src/datamodel_code_generator/model/type_alias.py
+++ b/src/datamodel_code_generator/model/type_alias.py
@@ -23,6 +23,8 @@ class TypeAliasBase(DataModel):
 
     IS_ALIAS: ClassVar[bool] = True
     SUPPORTS_GENERIC_BASE_CLASS: ClassVar[bool] = False
+    DOCSTRING_INDENT: ClassVar[int] = 0
+    FIELD_DOCSTRING_INDENT: ClassVar[int] = 0
 
     @property
     def imports(self) -> tuple[Import, ...]:
diff --git a/src/datamodel_code_generator/model/typed_dict.py b/src/datamodel_code_generator/model/typed_dict.py
index afe1a7dd9..fb687163c 100644
--- a/src/datamodel_code_generator/model/typed_dict.py
+++ b/src/datamodel_code_generator/model/typed_dict.py
@@ -164,13 +164,14 @@ def all_fields(self) -> Iterator[DataModelFieldBase]:
 
     def render(self, *, class_name: str | None = None) -> str:
         """Render TypedDict class with appropriate syntax."""
+        use_custom_template = self.template_file_path.is_absolute()
         return self._render(
             class_name=class_name or self.class_name,
-            fields=self.fields,
+            fields=self.fields if use_custom_template else self.rendered_fields,
             decorators=self.decorators,
             base_class=self.base_class,
             methods=self.methods,
-            description=self.description,
+            description=self.description if use_custom_template else self.rendered_description,
             is_functional_syntax=self.is_functional_syntax,
             all_fields=self.all_fields,
             **self.extra_template_data,
diff --git a/src/datamodel_code_generator/model/union.py b/src/datamodel_code_generator/model/union.py
index 1375c90fb..f2fabcdbf 100644
--- a/src/datamodel_code_generator/model/union.py
+++ b/src/datamodel_code_generator/model/union.py
@@ -26,6 +26,8 @@
 class _DataTypeUnionBase(DataModel):
     """Base class for GraphQL union types with shared __init__ logic."""
 
+    FORMAT_DESCRIPTION_AS_DOCSTRING: ClassVar[bool] = False
+
     def __init__(  # noqa: PLR0913
         self,
         *,
diff --git a/src/datamodel_code_generator/parser/base.py b/src/datamodel_code_generator/parser/base.py
index ada2399b3..cc51863a0 100644
--- a/src/datamodel_code_generator/parser/base.py
+++ b/src/datamodel_code_generator/parser/base.py
@@ -985,6 +985,7 @@ def __init__(  # noqa: PLR0912, PLR0915
         self.use_field_description: bool = config.use_field_description
         self.use_field_description_example: bool = config.use_field_description_example
         self.use_inline_field_description: bool = config.use_inline_field_description
+        self.use_single_line_docstring: bool = config.use_single_line_docstring
         self.use_default_kwarg: bool = config.use_default_kwarg
         self.reuse_model: bool = config.reuse_model
         self.reuse_scope: ReuseScope | None = config.reuse_scope
@@ -1068,6 +1069,8 @@ def __init__(  # noqa: PLR0912, PLR0915
                 self.generic_base_class_config["use_attribute_docstrings"] = True
             else:
                 self.extra_template_data[ALL_MODEL]["use_attribute_docstrings"] = True
+        if config.use_single_line_docstring:
+            self.extra_template_data[ALL_MODEL]["use_single_line_docstring"] = True
 
         if config.target_pydantic_version:
             if config.use_generic_base_class:
diff --git a/src/datamodel_code_generator/prompt_data.py b/src/datamodel_code_generator/prompt_data.py
index 21d442f9f..3dd5527f7 100644
--- a/src/datamodel_code_generator/prompt_data.py
+++ b/src/datamodel_code_generator/prompt_data.py
@@ -130,6 +130,7 @@
     "--use-generic-base-class": "Generate a shared base class with model configuration to avoid repetition (DRY).",
     "--use-generic-container-types": "Use generic container types (Sequence, Mapping) for type hinting.",
     "--use-inline-field-description": "Add field descriptions as inline comments.",
+    "--use-single-line-docstring": "Use single-line docstrings when the content fits on one line.",
     "--use-non-positive-negative-number-constrained-types": "Use NonPositive/NonNegative types for number constraints.",
     "--use-one-literal-as-default": "Use single literal value as default when enum has only one option.",
     "--use-operation-id-as-name": "Use OpenAPI operationId as the generated function/class name.",
diff --git a/tests/data/expected/main/help/color.txt b/tests/data/expected/main/help/color.txt
index f34ce56d9..20ef08006 100644
--- a/tests/data/expected/main/help/color.txt
+++ b/tests/data/expected/main/help/color.txt
@@ -256,6 +256,9 @@ For detailed usage, see: https://datamodel-code-generator.koxudaxi.dev
                         aliasing (Pydantic v2 only). This allows setting
                         values using the Pythonic field name while serializing
                         to the original name.
+  --use-single-line-docstring
+                        Use single-line docstrings when the content fits on
+                        one line
 
 Model customization:
   --all-exports-collision-strategy {error,minimal-prefix,full-prefix}
diff --git a/tests/data/expected/main/help/no_color.txt b/tests/data/expected/main/help/no_color.txt
index d31bbb398..1aa862595 100644
--- a/tests/data/expected/main/help/no_color.txt
+++ b/tests/data/expected/main/help/no_color.txt
@@ -256,6 +256,9 @@ Field customization:
                         aliasing (Pydantic v2 only). This allows setting
                         values using the Pythonic field name while serializing
                         to the original name.
+  --use-single-line-docstring
+                        Use single-line docstrings when the content fits on
+                        one line
 
 Model customization:
   --all-exports-collision-strategy {error,minimal-prefix,full-prefix}
diff --git a/tests/data/expected/main/input_model/config_class.py b/tests/data/expected/main/input_model/config_class.py
index 02437ce39..308ad584d 100644
--- a/tests/data/expected/main/input_model/config_class.py
+++ b/tests/data/expected/main/input_model/config_class.py
@@ -155,6 +155,7 @@ class GenerateConfig(TypedDict, closed=True):
     use_field_description_example: NotRequired[bool]
     use_attribute_docstrings: NotRequired[bool]
     use_inline_field_description: NotRequired[bool]
+    use_single_line_docstring: NotRequired[bool]
     use_default_kwarg: NotRequired[bool]
     reuse_model: NotRequired[bool]
     reuse_scope: NotRequired[ReuseScope]
diff --git a/tests/data/expected/main/use_single_line_docstring.py b/tests/data/expected/main/use_single_line_docstring.py
new file mode 100644
index 000000000..13760c888
--- /dev/null
+++ b/tests/data/expected/main/use_single_line_docstring.py
@@ -0,0 +1,20 @@
+# generated by datamodel-codegen:
+#   filename:  person.json
+#   timestamp: 2019-07-26T00:00:00+00:00
+
+from __future__ import annotations
+
+from typing import Any
+
+from pydantic import BaseModel, conint
+
+
+class Person(BaseModel):
+    firstName: str | None = None
+    """The person's first name."""
+    lastName: str | None = None
+    """The person's last name."""
+    age: conint(ge=0) | None = None
+    """Age in years which must be equal to or greater than zero."""
+    friends: list[Any] | None = None
+    comment: None = None
diff --git a/tests/data/expected/main_kr/generate_prompt/basic.txt b/tests/data/expected/main_kr/generate_prompt/basic.txt
index 90ebc7f90..509d6e3ee 100644
--- a/tests/data/expected/main_kr/generate_prompt/basic.txt
+++ b/tests/data/expected/main_kr/generate_prompt/basic.txt
@@ -75,6 +75,7 @@
 - `--use-inline-field-description`: Add field descriptions as inline comments.
 - `--use-schema-description`: Use schema description as class docstring.
 - `--use-serialization-alias`: Use serialization_alias instead of alias for field aliasing (Pydantic v2 only).
+- `--use-single-line-docstring`: Use single-line docstrings when the content fits on one line.
 - `--use-title-as-name`: Use schema title as the generated class name.
 
 ### Model Customization
@@ -432,6 +433,9 @@ For detailed usage, see: https://datamodel-code-generator.koxudaxi.dev
                         aliasing (Pydantic v2 only). This allows setting
                         values using the Pythonic field name while serializing
                         to the original name.
+  --use-single-line-docstring
+                        Use single-line docstrings when the content fits on
+                        one line
 
 Model customization:
   --all-exports-collision-strategy {error,minimal-prefix,full-prefix}
diff --git a/tests/data/expected/main_kr/generate_prompt/with_list_options.txt b/tests/data/expected/main_kr/generate_prompt/with_list_options.txt
index 820550c3a..f4f09a4a8 100644
--- a/tests/data/expected/main_kr/generate_prompt/with_list_options.txt
+++ b/tests/data/expected/main_kr/generate_prompt/with_list_options.txt
@@ -75,6 +75,7 @@
 - `--use-inline-field-description`: Add field descriptions as inline comments.
 - `--use-schema-description`: Use schema description as class docstring.
 - `--use-serialization-alias`: Use serialization_alias instead of alias for field aliasing (Pydantic v2 only).
+- `--use-single-line-docstring`: Use single-line docstrings when the content fits on one line.
 - `--use-title-as-name`: Use schema title as the generated class name.
 
 ### Model Customization
@@ -432,6 +433,9 @@ For detailed usage, see: https://datamodel-code-generator.koxudaxi.dev
                         aliasing (Pydantic v2 only). This allows setting
                         values using the Pythonic field name while serializing
                         to the original name.
+  --use-single-line-docstring
+                        Use single-line docstrings when the content fits on
+                        one line
 
 Model customization:
   --all-exports-collision-strategy {error,minimal-prefix,full-prefix}
diff --git a/tests/data/expected/main_kr/generate_prompt/with_options.txt b/tests/data/expected/main_kr/generate_prompt/with_options.txt
index 01f4ffb63..d34f82f54 100644
--- a/tests/data/expected/main_kr/generate_prompt/with_options.txt
+++ b/tests/data/expected/main_kr/generate_prompt/with_options.txt
@@ -81,6 +81,7 @@ What other options should I use?
 - `--use-inline-field-description`: Add field descriptions as inline comments.
 - `--use-schema-description`: Use schema description as class docstring.
 - `--use-serialization-alias`: Use serialization_alias instead of alias for field aliasing (Pydantic v2 only).
+- `--use-single-line-docstring`: Use single-line docstrings when the content fits on one line.
 - `--use-title-as-name`: Use schema title as the generated class name.
 
 ### Model Customization
@@ -438,6 +439,9 @@ For detailed usage, see: https://datamodel-code-generator.koxudaxi.dev
                         aliasing (Pydantic v2 only). This allows setting
                         values using the Pythonic field name while serializing
                         to the original name.
+  --use-single-line-docstring
+                        Use single-line docstrings when the content fits on
+                        one line
 
 Model customization:
   --all-exports-collision-strategy {error,minimal-prefix,full-prefix}
diff --git a/tests/data/expected/main_kr/generate_prompt/with_question.txt b/tests/data/expected/main_kr/generate_prompt/with_question.txt
index d6285a325..1cb9f1148 100644
--- a/tests/data/expected/main_kr/generate_prompt/with_question.txt
+++ b/tests/data/expected/main_kr/generate_prompt/with_question.txt
@@ -79,6 +79,7 @@ How do I convert enums to Literal types?
 - `--use-inline-field-description`: Add field descriptions as inline comments.
 - `--use-schema-description`: Use schema description as class docstring.
 - `--use-serialization-alias`: Use serialization_alias instead of alias for field aliasing (Pydantic v2 only).
+- `--use-single-line-docstring`: Use single-line docstrings when the content fits on one line.
 - `--use-title-as-name`: Use schema title as the generated class name.
 
 ### Model Customization
@@ -436,6 +437,9 @@ For detailed usage, see: https://datamodel-code-generator.koxudaxi.dev
                         aliasing (Pydantic v2 only). This allows setting
                         values using the Pythonic field name while serializing
                         to the original name.
+  --use-single-line-docstring
+                        Use single-line docstrings when the content fits on
+                        one line
 
 Model customization:
   --all-exports-collision-strategy {error,minimal-prefix,full-prefix}
diff --git a/tests/data/expected/main_kr/help_shows_new_options.txt b/tests/data/expected/main_kr/help_shows_new_options.txt
index f34ce56d9..20ef08006 100644
--- a/tests/data/expected/main_kr/help_shows_new_options.txt
+++ b/tests/data/expected/main_kr/help_shows_new_options.txt
@@ -256,6 +256,9 @@ For detailed usage, see: https://datamodel-code-generator.koxudaxi.dev
                         aliasing (Pydantic v2 only). This allows setting
                         values using the Pythonic field name while serializing
                         to the original name.
+  --use-single-line-docstring
+                        Use single-line docstrings when the content fits on
+                        one line
 
 Model customization:
   --all-exports-collision-strategy {error,minimal-prefix,full-prefix}
diff --git a/tests/data/templates_schema_id/pydantic_v2/BaseModel.jinja2 b/tests/data/templates_schema_id/pydantic_v2/BaseModel.jinja2
index 30f897675..b6c635dc4 100644
--- a/tests/data/templates_schema_id/pydantic_v2/BaseModel.jinja2
+++ b/tests/data/templates_schema_id/pydantic_v2/BaseModel.jinja2
@@ -11,9 +11,7 @@ an alias for Bar: every pydantic model class consumes considerable memory. #}
 {% endfor -%}
 class {{ class_name }}({{ base_class }}):{% if comment is defined %}  # {{ comment }}{% endif %}
 {%- if description %}
-    """
-    {{ description | escape_docstring | indent(4) }}
-    """
+    {{ description | format_docstring(4, use_single_line_docstring=use_single_line_docstring) }}
 {%- endif %}
 {%- if schema_id is defined and schema_id %}
     __schema_id__ = "{{ schema_id }}"
@@ -43,9 +41,7 @@ class {{ class_name }}({{ base_class }}):{% if comment is defined %}  # {{ comme
     {%- endif -%}
     {%- endif %}
     {%- if field.docstring %}
-    """
-    {{ field.docstring | escape_docstring | indent(4) }}
-    """
+    {{ field.docstring | format_docstring(4, use_single_line_docstring=use_single_line_docstring) }}
 {%- if field.use_inline_field_description and not loop.last %}
 
 {% endif %}
diff --git a/tests/main/test_main_general.py b/tests/main/test_main_general.py
index 3d848b5b6..b293f95dd 100644
--- a/tests/main/test_main_general.py
+++ b/tests/main/test_main_general.py
@@ -1930,6 +1930,60 @@ def test_generate_returns_string_with_dataclass() -> None:
     assert_output(result, EXPECTED_MAIN_PATH / "generate_returns_string_with_dataclass.py")
 
 
+@pytest.mark.allow_direct_assert
+def test_generate_uses_multiline_docstring_by_default() -> None:
+    """Test that schema descriptions keep the historical multi-line docstring format."""
+    json_schema = '{"title": "Person", "description": "Person model", "type": "object", "properties": {}}'
+    result = generate(
+        json_schema,
+        input_file_type=InputFileType.JsonSchema,
+        input_filename="schema.json",
+        use_schema_description=True,
+        disable_timestamp=True,
+    )
+    assert isinstance(result, str)
+    assert 'class Person(BaseModel):\n    """\n    Person model\n    """' in result
+
+
+@pytest.mark.allow_direct_assert
+def test_generate_uses_single_line_docstring_when_enabled() -> None:
+    """Test that schema descriptions use one-line docstrings when requested."""
+    json_schema = '{"title": "Person", "description": "Person model", "type": "object", "properties": {}}'
+    result = generate(
+        json_schema,
+        input_file_type=InputFileType.JsonSchema,
+        input_filename="schema.json",
+        use_schema_description=True,
+        use_single_line_docstring=True,
+        disable_timestamp=True,
+    )
+    assert isinstance(result, str)
+    assert 'class Person(BaseModel):\n    """Person model"""' in result
+
+
+@pytest.mark.cli_doc(
+    options=["--use-single-line-docstring"],
+    option_description="""Emit short docstrings on a single line.
+
+The `--use-single-line-docstring` flag formats docstrings that fit on one line
+as compact single-line docstrings while keeping the historical multi-line
+format as the default.""",
+    input_schema="jsonschema/person.json",
+    cli_args=["--use-field-description", "--use-single-line-docstring"],
+    golden_output="main/use_single_line_docstring.py",
+    related_options=["--use-schema-description", "--use-field-description"],
+)
+def test_main_use_single_line_docstring(output_file: Path) -> None:
+    """Emit short docstrings on a single line."""
+    run_main_and_assert(
+        input_path=DATA_PATH / "jsonschema" / "person.json",
+        output_path=output_file,
+        assert_func=assert_file_content,
+        expected_file="use_single_line_docstring.py",
+        extra_args=["--use-field-description", "--use-single-line-docstring"],
+    )
+
+
 def test_generate_returns_none_when_output_path_provided(tmp_path: Path) -> None:
     """Test that generate() returns None when output path is provided."""
     json_schema = '{"type": "object", "properties": {"name": {"type": "string"}}}'
diff --git a/tests/main/test_public_api_signature_baseline.py b/tests/main/test_public_api_signature_baseline.py
index b5511a070..46c36e47b 100644
--- a/tests/main/test_public_api_signature_baseline.py
+++ b/tests/main/test_public_api_signature_baseline.py
@@ -93,6 +93,7 @@ def _baseline_generate(
     use_field_description_example: bool = False,
     use_attribute_docstrings: bool = False,
     use_inline_field_description: bool = False,
+    use_single_line_docstring: bool = False,
     use_default_kwarg: bool = False,
     reuse_model: bool = False,
     reuse_scope: ReuseScope = ReuseScope.Module,
@@ -234,6 +235,7 @@ def __init__(
         use_field_description_example: bool = False,
         use_attribute_docstrings: bool = False,
         use_inline_field_description: bool = False,
+        use_single_line_docstring: bool = False,
         use_default_kwarg: bool = False,
         reuse_model: bool = False,
         reuse_scope: ReuseScope | None = None,
diff --git a/tests/model/test_base.py b/tests/model/test_base.py
index 2a0fbfe1e..86474b3e5 100644
--- a/tests/model/test_base.py
+++ b/tests/model/test_base.py
@@ -13,6 +13,7 @@
     DataModelFieldBase,
     TemplateBase,
     escape_docstring,
+    format_docstring,
     get_module_path,
     sanitize_module_name,
 )
@@ -396,6 +397,37 @@ def test_escape_docstring(input_value: str | None, expected: str | None) -> None
     assert escape_docstring(input_value) == expected
 
 
+def test_format_docstring_uses_multiline_format_by_default() -> None:
+    """Test format_docstring preserves historical multi-line formatting by default."""
+    assert format_docstring("Description", 4) == '"""\n    Description\n    """'
+
+
+@pytest.mark.parametrize("empty_value", [None, "", "   "])
+def test_format_docstring_returns_empty_string_for_empty_values(empty_value: str | None) -> None:
+    """Test format_docstring returns an empty string for empty values."""
+    assert not format_docstring(empty_value, 4)
+
+
+def test_format_docstring_uses_single_line_when_enabled() -> None:
+    """Test format_docstring emits one-line docstrings when enabled."""
+    assert format_docstring("Description", 4, use_single_line_docstring=True) == '"""Description"""'
+
+
+def test_format_docstring_escapes_trailing_quote_without_changing_docstring() -> None:
+    """Test one-line docstrings ending with a quote preserve their value."""
+    assert format_docstring('Description"', 4, use_single_line_docstring=True) == r'"""Description\""""'
+
+
+def test_format_docstring_escapes_single_quote_docstring() -> None:
+    """Test a docstring consisting only of a quote is escaped."""
+    assert format_docstring('"', 4, use_single_line_docstring=True) == r'"""\""""'
+
+
+def test_format_docstring_keeps_escaped_triple_quotes_without_extra_escape() -> None:
+    """Test escaped triple quotes at the end are not double-escaped."""
+    assert format_docstring('Description """', 4, use_single_line_docstring=True) == r'"""Description \"\"\""""'
+
+
 def test_inline_field_docstring_escapes_special_chars() -> None:
     """Test inline_field_docstring property escapes special characters."""
     field = DataModelFieldBase(