JSON Editor Online
Edit JSON with Monaco Editor. Validate syntax, format code, visualize tree structure, and download files. VS Code-powered editing in your browser.
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Professional JSON Editor
Edit JSON files with Monaco Editor, the same editor that powers Visual Studio Code. Features IntelliSense, syntax highlighting, bracket matching, and real-time validation. Switch between code and tree view for the best editing experience.
Key Features
- Monaco Editor (VS Code engine)
- Real-time JSON validation with error messages
- Interactive collapsible tree view
- Format (beautify) and minify operations
- Download and upload .json files
- Save last 10 files locally
- Dark and light theme support
- Copy to clipboard with one click
- 100% free, privacy-focused (browser-only)
How to Use
- Paste or type JSON in the Code View editor
- See real-time validation errors (if any)
- Click "Format" to beautify or "Minify" to compress
- Switch to Tree View to visualize the structure
- Expand/collapse nodes in the tree
- Click "Download" to save as .json file
- Use "Upload" to load an existing JSON file
- • Validate JSON API responses
- • Format minified JSON for readability
- • Visualize complex JSON structures
- • Edit configuration files
- • Debug JSON parsing errors
- • Convert between formats
- • Learn JSON structure visually
- • Clean up malformed JSON
Frequently Asked Questions
Everything you need to know about our JSON Editor
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