Privacy-First Developer Tools
JSONLab was built because developers deserve tools that respect their privacy. Every feature runs entirely in your browser—no servers, no tracking, no compromises.
🛡️ Privacy Guarantee
Your Data Never Leaves Your Browser
All JSON processing happens locally via Web Workers. No server uploads, no cloud storage, no data collection.
Zero Tracking
No analytics, no cookies, no fingerprinting. We don't know what you're working on, and we like it that way.
Open Source & Auditable
Every line of code is public on GitHub. Security researchers and developers can verify our privacy claims.
Works Offline
After the initial load, JSONLab works completely offline. Perfect for sensitive environments.
Enterprise-Grade Features
Lightning Fast
Sub-second load times, optimized for mobile. Handle 50MB+ JSON files without lag.
Batch Processing
Upload multiple JSON files, get formatted ZIP. Process 100+ files simultaneously.
JSON5 Support
Auto-fix trailing commas, single quotes. Smart error correction for relaxed JSON.
URL Sharing
Share formatted JSON via encrypted URL parameters. Collaborate without servers.
PWA Support
Install as desktop app. Full offline functionality after 2MB initial download.
XML Formatter
Format and beautify XML with validation. Handle complex XML structures with proper indentation.
🛠️ Built for Developers, by Developers
Tech Stack
- • Vite - Lightning-fast build tool
- • Web Workers - Non-blocking processing
- • Tailwind CSS - Optimized styling
- • Vanilla JS - No framework bloat
- • Progressive Web App - Offline capability
Keyboard Shortcuts
- • Ctrl+Enter - Format JSON
- • Tab - Smart indentation
- • Ctrl+K - Clear output
- • Ctrl+S - Download file
- • Ctrl+V - Paste and format
📊 Performance Benchmarks
🌟 Why Bookmark JSONLab?
Always Available When You Need It
JSON debugging happens unexpectedly. Bookmark JSONLab (Ctrl+D) for instant access during those critical moments.
Works Offline
Once bookmarked, JSONLab works even when you're off the grid. Perfect for air-gapped environments.
No Signup Friction
Skip the account creation. Bookmark once, use forever. Your productivity shouldn't wait for login screens.
Privacy-First
Your sensitive JSON data never leaves your browser. Bookmark the tool you can trust with production data.
Press Ctrl+D (or Cmd+D on Mac) to bookmark JSONLab
🚀 Open Source & Community
JSONLab is open source and welcomes contributions. Found a bug? Want a new feature? The community drives our roadmap.