JSON Viewer & Beautifier
Format, validate, explore, convert, and compare JSON, all in your browser with syntax highlighting and a collapsible tree view
JSON Input
Formatted JSON
Formatted JSON will appear here...
Features
Formatting
- • Pretty-print with indentation
- • Syntax highlighting
- • Minify for production
- • Real-time validation
Tree View
- • Collapsible objects & arrays
- • Navigate large JSON files
- • Color-coded data types
- • Expandable nested structures
Export Options
- • Copy to clipboard
- • Download as .json file
- • Convert to CSV or XML
- • Compare two JSON files
- • Dark/Light mode toggle
- • Error line detection
About JSON Viewer & Beautifier
A powerful tool for visualizing, formatting, and analyzing JSON data with an interactive tree view, syntax highlighting, and comprehensive validation features.
View Detailed Information
Advanced Features:
- Interactive tree view navigation
- Dark/Light mode support
- Real-time syntax validation
- One-click beautification
- Intelligent error detection
Perfect For:
- API response inspection
- Data structure analysis
- Configuration file editing
- Debug output formatting
- JSON schema validation
Pro Tips:
- Use tree view for large files
- Copy formatted JSON for documentation
- Toggle dark mode for night coding
- Check error locations instantly
Compare two JSON files
Paste a JSON on each side to see exactly what changed: values added, removed, or modified.
Frequently asked questions
Is this JSON viewer free and private?▾
Yes. It is completely free with no signup, and everything runs locally in your browser, so your data never leaves your device.
Can it fix or validate invalid JSON?▾
It validates JSON as you paste and points out syntax errors, then formats and beautifies valid JSON with a collapsible tree view.
Is there a size limit?▾
It handles large documents in-browser; very large files (tens of MB) may render slowly since all processing happens on your device.