Download
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The downloads here are for both the free version and the paid version.
The only limitation of the free version is that you cannot use it to save/export Protocol Buffers data.
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By downloading Mouse Melon you agree with the Terms and Conditions.
Version history
Version 1.3.0
Released on 2026-05-31.
- New: Export/copy in JSON (ProtoJSON) format
- New: Option to export only selected nodes
- New: Map items can be duplicated
- Improved: Last-used folders are remembered, so file dialogs start in a folder that makes sense
- Improved: In the project tab, type names in documentation can now be clicked for navigation
- Bug fix: Duplicating repeated items that contained repeated items themselves went wrong
- Several other improvements and bug fixes
- Includes Protocol Buffers 34.2
Version 1.2.1
Released on 2025-02-10.
Download:
Windows installer (.msi),
Windows portable (.zip),
macOS (.dmg),
Linux (.tar.gz)
- Bug fix: Public imports didn't work
- Includes Protocol Buffers 29.3
Version 1.2.0
Released on 2024-12-18.
Download:
Windows installer (.msi),
Windows portable (.zip),
macOS (.dmg),
Linux (.tar.gz)
- New: Customize font and colors
- New: Dark mode support on macOS and Linux
- Bug fix: The "save before closing" feature didn't work in 1.1.0
- Several other improvements and bug fixes
- Includes Protocol Buffers 28.3
Version 1.1.0
Released on 2024-12-03.
Download:
Windows installer (.msi),
Windows portable (.zip),
macOS (.dmg),
Linux (.tar.gz)
- New: Import and export hexadecimal and base-64 encoded data
- New: Edit stream/array of Protocol Buffers messages
- Improved the navigation tree in projects
- Several other improvements and bug fixes
- Includes Protocol Buffers 28.3
Version 1.0.0
Initial version, released on 2024-07-07.
Download:
Windows installer (.msi),
Windows portable (.zip),
macOS (.dmg),
Linux (.tar.gz)
- Includes Protocol Buffers 27.2
