Can this tool validate JSON?

Yes, the formatter validates your JSON and shows exact error locations with line numbers if the syntax is invalid. It also offers auto-fix suggestions for common errors like missing quotes or trailing commas.

Does it support minification?

Yes, you can both beautify (expand with proper indentation) and minify (compress to one line) JSON with a single click toggle.

Is my JSON data secure?

Absolutely. All processing happens locally in your browser. Your JSON data is never uploaded to any server — 100% client-side.

Can I convert JSON to other formats?

Yes, the tool supports JSON to CSV, JSON to XML, and JSON to TypeScript interface conversion. You can also escape or unescape JSON strings.

What is the tree view feature?

The tree view displays your JSON as a collapsible hierarchical structure, making it easy to explore complex nested objects without reading through raw text.

Does it work with large JSON files?

Yes, the tool handles JSON files up to 50MB. The tree view and formatting are optimized for large documents, though extremely large files may have slower performance.

Can I share my formatted JSON?

Yes, you can generate a shareable link with your JSON data compressed into the URL. This works best for small to medium-sized JSON documents.

Formatter Tools

JSON Formatter

Free online JSON formatter and validator. Beautify, minify, validate, and convert JSON instantly. 100% client-side processing — your data never leaves your browser. Features include dark mode, collapsible tree view, JSON to CSV/XML conversion, TypeScript interface generation, JSON escape/unescape, auto-fix for common errors, and real-time syntax validation with error line highlighting.

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Quick Info

Browser-based
Instant results
Free — No signup

Format JSON

How to use JSON Formatter

Paste JSON

Paste your raw or minified JSON data into the input field. Or drag and drop a .json file for instant formatting.

Format & Validate

The tool instantly formats, prettifies, and validates your JSON with real-time error highlighting and line numbers.

Copy or Download

Copy the formatted JSON to clipboard, download as .json file, or convert to CSV, XML, or TypeScript interfaces.

Indent

Drop a .json file here or click to browse

Or paste JSON directly into the editor below • Max 50MB

Input JSON

Formatted

Formatted JSON will appear here...

Ctrl+Enter FormatCtrl+S SaveCtrl+F SearchEsc Close

Key Features

Real-time JSON formatting as you type
Syntax validation with error line highlighting and auto-fix suggestions
Minify and beautify modes with one-click toggle
Customizable indentation (2, 3, 4 spaces, or tabs)
Dark mode / Light mode toggle for comfortable viewing
Collapsible tree view for exploring complex JSON structures
JSON to CSV, XML, and TypeScript interface conversion
JSON escape and unescape utilities
Drag & drop file upload with visual feedback
Search & replace within JSON editor
Shareable link with compressed JSON
History of recent JSONs saved in your browser
Keyboard shortcuts for power users
No data sent to any server — 100% client-side processing

Common Use Cases

Debug API responses during development
Clean up and beautify minified JSON from production logs
Validate JSON before deployment to catch syntax errors
Convert JSON data to CSV for spreadsheet analysis
Generate TypeScript interfaces from JSON payloads
Format configuration files (package.json, tsconfig, etc.)
Compare two JSON responses side by side with diff highlighting

Technical Details

Input Format: JSON (RFC 8259 compliant)

Output Formats: JSON, CSV, XML, TypeScript

Max File Size: 50MB

Processing: Client-side (JavaScript)

Privacy: No data leaves your device

Indentation: 2, 3, 4 spaces or tabs

Browser Support: All modern browsers