If you're tired of endlessly looking online for the right tool, or to find again that website of which you don't recall the name just for a quick conversion, this is the right app for you.
This is a collection of powerful yet simple-to-use tools to solve the most common daily development problems.
Includes:
- JSON to YAML converter and vice-versa
- CRON expressions parser
- GZip compressor and decompressor
- Formatters for common programming languages
- Hash generators
- Regex tester
- Markdown Previewer
- Image converters
- Much more...
Screenshots
Observed history
| App | Change | Version | When ↑ |
|---|
No observed changes yet.
The initial import establishes a baseline. Future version changes will appear here.
Browse the app catalogue →Upstream releases
Release notes supplied by the developer. These dates are not Flathub package publication times.
1.3.128 Mar 2026
What's new:
- GNOME 50 platform support
- Removed Markdown Previewer due to webkit issues
1.3.06 Jul 2025
What's new:
- New Tool: Color Converter, convert colors between different formats (thanks @Flachz)
- JWT: now supports encoding payloads and signature verification (thanks @Flachz)
- Chmod: added support for special bits (
setuid,setgid, andsticky) (thanks @Flachz) - Improved search: Dev Toolbox now has more keywords, improving discoverability in the OS and app stores (thanks @freeducks-debug)
- Improved in-app search: Tools now match not just their names and descriptions, but also tool-specific keywords
- Dev Toolbox is now a GNOME search provider: search and launch tools directly from the Activities screen
- Updated translations
We've now passed 50k downloads on Flathub and 300 GitHub stars!
Huge thanks to everyone who contributed, translated, reviewed, used the app, or helped spread the word. This project started as a tiny idea. I never imagined it would grow this far.
1.2.53 May 2025
What's new:
- Text diff: highlight colors now change with the applied theme
- Base converter: added convertion for ASCII and UTF8 characters
- Base64: added support for base64url processing
- Updated translations
1.2.425 Apr 2025
What's new:
- Updated to GNOME 48 platform
- UI uses new libadwaita 1.7 widgets
- Updated translations