DevToys — Swiss Army Knife for Developers
Free open-source offline desktop app for Windows featuring 30+ formatters, converters, and hash tools.
What It Is & How It Works
DevToys is an acclaimed open-source Windows application designed for developers. Known as the 'Swiss Army knife for developers', it operates 100% offline to format JSON, decode JWT tokens, compare text diffs, test regular expressions, generate UUIDs, encode Base64, and convert color codes.
Best Use Cases & Target Audience
Software engineers and IT admins needing instant, secure, offline developer utility tools on Windows.
- JSON formatter & validator
- JWT decoder
- Text diff comparison
- Regex tester
- Base64 & URL encoder
- Hash generator (MD5, SHA256)
Installation Method & Requirements
Microsoft Store or winget install DevToys
Known Limitations & Considerations
- Desktop app window (not a pinned taskbar widget).
UTL Editorial Review & Verdict
DevToys is arguably the single best offline developer app available on Windows. Its smart clipboard detection automatically suggests the right tool when you paste code.
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