v1.0 • Privacy-first • Runs locally
#1 Collection
of Dev Tools.
Format JSON, decode JWTs, generate UUIDs, encode Base64, validate YAML, inspect tokens, and dozens of other everyday developer tools all running completely in your browser.
Collection
Developer Tools
Fast, privacy-first utilities that run completely inside your browser.
Upcoming
JSON Formatter
Format and validate JSON with one click.
JWT Decoder
Decode and inspect JWT tokens instantly.
Base64 Encoder/Decoder
Encode or decode Base64 strings.
URL Encoder/Decoder
Encode or decode URL components.
JSON Validator
Validate JSON syntax and catch errors instantly.
Regex Tester
Test and debug regular expressions live.
UUID Generator
Generate v4 UUIDs instantly.
Password Generator
Generate strong, random passwords.
Why Simple Dev Tools?
Built for developers.
Lightning Fast
Everything runs instantly in your browser.
Privacy First
Your data never leaves your device.
Free Forever
No sign-up, no limits, no paywall.
Upcoming
Offline Ready
Many tools continue working without internet.
FAQ
