Cross-platform desktop app for Azure Service Bus: browse resources, inspect and operate on messages, manage dead-letter queues. Built with Blazor Server, Electron.NET, MudBlazor, and Fluxor.
Browse queues, topics, and subscriptions in a collapsible tree with live active and dead-letter message counts. Each resource has an Overview tab (status, dates) and a Properties tab (full configuration, storage and quota details). The dead-letter sub-queue is accessible directly from the resource panel.
Fetch messages from queues and topic subscriptions with three modes:
- Peek - non-destructive; configurable start sequence number for offset-based peeking
- Receive / PeekLock - locks messages for explicit settlement; configurable wait time
- Receive / ReceiveAndDelete - removes messages immediately on receive; configurable wait time
The message list shows Sequence #, Message ID, Label, Enqueued Time, and Delivery Count. Dead-letter views add Reason and Error Description. Live search runs across all visible fields, and messages can be multi-selected for bulk operations.
The inline message viewer has a Body tab with syntax highlighting and a Properties tab covering all broker properties (ContentType, CorrelationId, TimeToLive, etc.) plus custom application properties.
Customize which columns appear in the message grid via a right-click context menu on any column header. Changes apply globally to all queues and subscriptions.
Column management:
- Add column β pick any broker property (e.g.
CorrelationId,SessionId,TimeToLive) or enter a free-form application property key; optionally override the column title - Remove column β removes the column from the current view (SEQ # is permanently locked)
- Reorder columns β drag-and-drop any column header to rearrange
Named views:
- Switch view β select a saved view from the context menu; a checkmark shows the active view
- Save current view β overwrite the active view with the current column layout (disabled for the built-in Default view)
- Save view asβ¦ β create a new named view from the current layout; the new view becomes active
- Delete view β delete the active user-defined view; falls back to Default (disabled for the built-in Default view)
The built-in Default view shows: SEQ #, MESSAGE ID, LABEL, ENQUEUED TIME, DELIVERY COUNT. Dead-letter views automatically append REASON and ERROR DESCRIPTION columns regardless of the active view. All user-defined views are persisted locally across sessions.
Available actions depend on the fetch mode:
- Resend - re-sends selected message(s) to the queue or topic. In PeekLock mode, a successful resend completes the original. In Peek and ReceiveAndDelete modes this can create duplicates intentionally.
- Complete (PeekLock only) - settle and remove message(s)
- Abandon (PeekLock only) - release the lock so message(s) become available again
- Dead-Letter (PeekLock only) - move message(s) to the dead-letter sub-queue
Send a message to any queue or topic. Supports JSON (with one-click formatting) and Plain Text bodies, all standard broker properties (Label, Message ID, Correlation ID, Partition Key, Session ID, Scheduled Enqueue Time, TTL, and more), and custom application properties as key/value pairs.
Smart search bar in the Explorer tree with special-phrase autocomplete:
- Plain text - filter by resource name
namespace:x- limit the tree to a specific namespace; autocompletes connected namespace nameshas:dlq- show only resources with active dead-letter messages- Phrases combine freely:
namespace:prod has:dlq,namespace:prod orders
Virtual groups inside a namespace for organizing resources by workflow, team, or incident context, without changing anything in Azure. Create, rename, and delete folders per namespace; assign queues and subscriptions to one or more folders. Adding a topic to a folder automatically includes its subscriptions. Refreshing a folder refreshes all resources inside it.
Export messages from a queue or subscription to a JSON file for backup, replay, or sharing between environments. Import messages from a JSON file into a queue or topic. Both run as background jobs with status visible on the Jobs page.
Note: Import may introduce duplicate messages.
Add, edit, and delete named namespace connections. Two authentication methods are supported:
- Connection String - paste a standard Azure Service Bus connection string
- Entra ID - authenticate with Tenant ID + Client ID (Azure AD / Microsoft Entra)
Multiple connections are managed side by side in the Explorer.
Connect using a connection string in this format:
Endpoint=sb://localhost:5300;SharedAccessKeyName=RootManageSharedAccessKey;SharedAccessKey=SAS_KEY_VALUE;UseDevelopmentEmulator=true;
The port in Endpoint (e.g. :5300) is required for emulator management operations. Supported: viewing resources, sending messages, fetching messages. Active and dead-letter message counts are not available with the emulator.
- Activity Log - persistent panel at the bottom showing connection and fetch events across all namespaces
- Dark Mode - built-in dark theme
- Keyboard shortcuts -
F5refreshes the selected resource in the Explorer tree;β/βnavigates the message list
| Tool | Description |
|---|---|
| ServiceBusExplorer | Feature-rich Windows desktop tool for Azure Service Bus by Paolo Salvatori |
Messentra is licensed under the GNU General Public License v3.0.