DevTools

40+ developer tools: JSON formatter, Base64/URL encoder, hash generator, JWT debugger, regex tester, and more

DevTools - Your All-in-One Developer Toolkit Stop wasting time switching between different websites and tools. DevTools brings 40+ essential developer utilities right into your browser, available instantly with a single click. What is DevTools? DevTools is a comprehensive offline toolkit that combines all the utilities developers use daily into one convenient Chrome extension. Whether you need to format JSON, encode Base64, generate passwords, or debug JWT tokens – it's all here, working entirely in your browser. Why Install DevTools? ⚡ Save Time No more bookmarking dozens of online tools. No more waiting for web pages to load. Everything you need is one click away, working instantly without any network requests. 🔒 100% Private & Secure Unlike online tools, DevTools processes everything locally in your browser. Your code, API keys, tokens, and sensitive data never leave your computer. Perfect for working with confidential information. 📴 Works Offline Internet down? No problem. DevTools works completely offline. Use it on flights, in areas with poor connectivity, or anywhere you need to work without internet access. 🎯 Developer-Focused Built by developers, for developers. Every tool is designed with real-world use cases in mind. Clean interface, fast performance, and keyboard-friendly design. What Can You Do With DevTools? Format & Validate Data Format messy JSON into readable, indented code Validate JSON syntax and catch errors instantly Beautify or minify HTML, CSS, JavaScript, XML, and SQL Encode & Decode Base64 encode/decode text and images URL encode/decode for safe query parameters HTML entity encode/decode for web content JWT token decode and inspection Generate Secure Values Create strong passwords with customizable rules Generate UUIDs and ULIDs in bulk Compute MD5, SHA-1, SHA-256, SHA-512 hashes Generate QR codes from any text or URL Convert Formats Unix timestamps ↔ readable dates Binary ↔ Octal ↔ Decimal ↔ Hexadecimal YAML ↔ JSON CSV ↔ JSON HTML → JSX (React) Colors: HEX ↔ RGB ↔ HSL Analyze & Transform Text Compare texts and highlight differences Test regular expressions with live matching Preview Markdown rendering Convert text case (camelCase, snake_case, etc.) Sort, dedupe, and manipulate lines Developer Utilities Parse and explain cron expressions Convert cURL commands to code (Python, JavaScript, Go, PHP, Java) Generate code from JSON (TypeScript, Python, Swift, Go, Java) Decode X.509 certificates Convert SVG to CSS background Who Is This For? Frontend Developers - Format code, preview Markdown, convert HTML to JSX Backend Developers - Debug JWT tokens, parse cron, generate hashes Full-Stack Developers - Convert cURL to code, transform data formats DevOps Engineers - Decode certificates, parse timestamps, work with configs Anyone Who Codes - All the everyday tools in one place Features You'll Love ✓ Dark and light themes for comfortable viewing ✓ English and Chinese language support ✓ Quick search to find any tool instantly ✓ One-click copy for all outputs ✓ Clean, modern interface with no clutter ✓ Zero setup – works immediately after install Free. Fast. Private. DevTools is completely free with no hidden features, subscriptions, or accounts required. Install it once and have instant access to all 40+ tools forever. Start saving time today. Install DevTools now!