Free Online JSON Code Editor & Live JSON IDE
Browser-based JSON editor with real-time syntax checking, bracket matching, multi-file tabs, and one-click JSON export to file — 100% client-side.
How It Works
Fast, secure, browser-native JSON processing in 3 simple steps
Paste or Upload JSON
Paste raw JSON into the code editor or drag and drop your local .json file.
Edit in Real Time
Modify keys and values with live syntax checking, bracket matching, and folding.
Format & Export to File
Click Format (Cmd+Shift+F) to beautify, then click Export to download your saved file.
The Complete Browser-Based JSON Editor and Exporter
JSONForge is a high-performance, web-based JSON editor designed for software developers, data engineers, and API architects. Whether you need to fix a broken payload, build test fixtures from scratch, or format and export JSON data to files, JSONForge provides a full IDE environment in your browser without requiring software installation or server uploads.
Built on CodeMirror 6, our editor delivers instantaneous AST syntax linting, bracket autoclosing, code folding, multi-cursor editing, and persistent IndexedDB workspace management.
⚡ Real-Time Live Editing & Linting
Powered by CodeMirror 6 with instant AST syntax parsing. Identifies missing commas, unescaped characters, unclosed quotes, and trailing commas with precise line and column markers.
💾 JSON Editor Export to File
Easily edit and download JSON files directly to your device. Save formatted JSON, minified strings, or convert to CSV, YAML, and TypeScript interfaces with one click.
🔒 100% Client-Side Privacy
Zero data leaves your browser. All parsing, validation, formatting, and file export operations occur entirely in your local browser memory using JavaScript and Web Workers.
📂 Multi-Tab Workspace & Offline Storage
Open multiple JSON documents in tabs, split views, and enjoy automatic crash recovery powered by browser-local IndexedDB persistence.
Productivity Keyboard Shortcuts
| Action | macOS | Windows / Linux |
|---|---|---|
| Format & Beautify Document | Cmd + Shift + F | Ctrl + Shift + F |
| Open Command Palette | Cmd + K | Ctrl + K |
| Find and Replace | Cmd + F / Cmd + H | Ctrl + F / Ctrl + H |
| Undo / Redo | Cmd + Z / Cmd + Shift + Z | Ctrl + Z / Ctrl + Y |
Frequently Asked Questions
Everything you need to know about JSON validation, formatting, and privacy
Related Developer Tools
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JSON Formatter →
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JSON Validator →
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JSON Health Score →
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Structural Diff Lab →
Compare two JSON documents structurally.
JSON Minifier →
Compress whitespace for production payloads.