Skip to content
EN

Software · Development

Sonar

Inspect and debug webhooks.

  • Completely free
  • Linux
  • Open source

Overview

Features described in its Flathub listing and in its GitHub repository: API for automation and integration, debugging, version history.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information
  • “Inspect and debug webhooks” — Flathub, 10 November 2026
  • “Sonar is a native tool for debugging webhooks.” — Flathub, 10 November 2026
  • “For detailed release notes and version history, see CHANGELOG.md.” — GitHub, 10 November 2026

At a glance

Sonar is completely free: it is open source software, and every feature is available without paying or subscribing.

Its licence (GPL-3.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

  • Open source code
  • Commercial use allowed

About

Sonar is a native tool for debugging webhooks. It captures incoming requests and lets you inspect headers, body content, and query parameters in real-time. Core Features: Instant public URLs via ngrok integration for webhook testing Real-time capture of incoming webhook requests as they arrive Detailed inspection of headers, body content, query parameters, and metadata Quick copy functionality including JSON, cURL, and HTTP formats Clean Libadwaita interface that integrates perfectly with GNOME Fast and lightweight native application with minimal resource usage Advanced Features: Request bookmarking and starring for quick access Request replay to resend webhooks to custom URLs Side-by-side request comparison to spot differences Request templates for saving and reusing webhook patterns Automatic webhook forwarding to multiple URLs Advanced filtering by method, content-type, time range, and search Persistent history with JSON storage

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) —
  • Last technical check: 8 November 2026
  • Description from Flathub — AppStream (Flathub)

How listings are built →

Do you develop Sonar?

Correct this listing with the report form, or cite it with this optional badge (it shows the verified free status and changes nothing in the ranking):

<a href="https://licitpro.fr/en/resource/sonar"><img src="https://licitpro.fr/badge/sonar.svg?l=en" alt="Listed on LicitPro" height="20"></a>

Developers and publishers →

In the same category

Visual Studio Code

Software

Visual Studio Code is a code editor, available on Windows, macOS and Linux: debugging and built-in terminal.

Completely freeWinMacLinux

DBeaver Community

Software · Open source

DBeaver Community is a database management program, available on Windows, macOS and Linux: code completion, syntax highlighting, plugins and add-ons.

Completely freeWinMacLinux

Zed

Software · Open source

Zed is a code editor, available on Windows, macOS and Linux: code completion.

Limited free planWinMacLinux

Konsole

Software · Open source

Konsole is a terminal emulator, available on Windows and Linux: command-line use.

Completely freeWinLinux

DB Browser for SQLite

Software · Open source

DB Browser for SQLite is a database management program, available on Windows, macOS and Linux: data import and export.

Completely freeWinMacLinux

pgAdmin 4

Software · Open source

Admin and development platform for PostgreSQL.

Completely freeWinMacLinux