About DevTools Suite
Free, private, browser-based tools for developers and technical users.
DevTools Suite is a free collection of developer productivity tools that run entirely in your browser. No login required. No data sent to servers. No tracking of your content. Open a tool, use it, close it — your data stays on your device.
Our philosophy
Privacy first
All processing happens locally in your browser. Your code, tokens, JSON, and checklist data never leave your device.
Zero friction
Open a tool and start using it immediately. No accounts, no onboarding, no paywalls, no cookie popups.
Fast
Lightweight static pages with minimal JavaScript. Optimized for instant load times and smooth interactions.
Accessible
Keyboard navigation, screen reader support, and first-class dark and light mode across all tools.
Tools available
Smart Checklist
Convert any list to an interactive checklist with drag-and-drop, PDF export, and shareable URLs.
JSON Formatter
Prettify, minify, validate and explore JSON with syntax highlighting.
Cron Generator
Build and validate cron expressions visually with next-execution previews.
Diff Checker
Compare two texts side by side with line, character, and JSON diff modes.
JWT Decoder
Decode JWT tokens and inspect header, payload, and expiry claims.
Regex Tester
Test regular expressions live with match highlighting and replace preview.