Developer Tools
That Respect Your Privacy
75+ essential utilities in one fast desktop app.
Free and open source. No account or API key required.
Free forever · No account required · macOS, Windows, Linux
Built for developers
Tools that actually save you time
Stop switching between browser tabs and signing up for services. Everything works instantly, offline.
JSON Formatter & Validator
Format, validate, minify, and explore JSON with a tree view. Handles multi-MB files instantly — no browser limits.
Try it free
JWT Debugger
Decode, inspect, and verify JWTs instantly. Color-coded header, payload, and signature sections with expiration checks.
Try it free
Dummy Data Generator
Generate realistic mock data — users, addresses, transactions — in JSON, CSV, or SQL. Perfect for testing and prototyping.
Try it free
Text Diff Checker
Compare two texts side-by-side with highlighted insertions and deletions. Spot changes instantly with color-coded diffs.
Try it freePlus 71 more tools included in the desktop app.
Browse all toolsPrivacy-first
Local tools.
Open source you can inspect.
Local tools process data on your device. Network tools connect when you use them, capture sharing is optional, and update checks can be disabled. Read the source on GitHub.
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