DevTools

About

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!