Format, Validate & Explore JSON Instantly
Paste JSON below and get instant formatting, validation, and tree view.
Free Online JSON Formatter & Validator
JSONFormatter.club is a powerful, free JSON formatter online tool for developers. Instantly format JSON, validate structure, minify for production, or explore with an interactive tree view. Whether you're debugging API responses, cleaning config files, or learning JSON — this is the fastest JSON beautifier available.
Need a JSON validator? Paste your JSON and get instant feedback with exact error location. Looking for a JSON viewer or JSON parser? Switch to Tree View and explore your data structure interactively. Want to pretty print JSON? Hit Format and choose your indentation. This is the JSON lint and JSON editor online you've been looking for.
⚡ Instant Format
Beautify JSON with 2-space, 4-space, or tab indentation. One click.
✅ Real-time Validation
Errors highlighted with exact line and column. Fix issues instantly.
🌲 Tree View
Collapsible tree visualization. Click nodes to see JSON paths.
🗜️ Minify
Compress JSON to single line for production or API payloads.
🔧 Auto-Fix
Fix trailing commas, single quotes, unquoted keys automatically.
📂 Drag & Drop
Drop .json files directly. Or fetch from any URL.
🔍 Search & Filter
Find keys or values in large JSON documents instantly.
📋 JSON Path
Click any value to see its path: $.users[0].name
🔄 Convert
JSON to CSV, JSON to YAML. Export in different formats.
💾 History
Auto-saves your work. Come back and continue where you left off.
🌗 Dark Mode
Easy on the eyes. Follows system preference or toggle manually.
⌨️ Shortcuts
Ctrl+Enter format, Ctrl+M minify, Ctrl+Shift+V validate.
How It Works
- Paste your JSON, drop a file, or fetch from a URL
- JSON is validated in real-time — errors shown instantly
- Click Format to beautify, Minify to compress, or Tree to visualize
- Copy the output, download as file, or explore the tree view
Frequently Asked Questions
Is JSONFormatter.club free?
Yes, 100% free with no limits. No signup, no ads. All features available to everyone.
Is my JSON data safe?
Absolutely. Everything runs in your browser. We never send your data to any server. Zero tracking of your content.
What's the maximum JSON size?
There's no hard limit. Most browsers handle 5MB+ of JSON without issues. Performance depends on your device.
Can it fix invalid JSON?
Yes! Click "Fix JSON" to automatically repair trailing commas, single quotes, unquoted keys, and other common issues.
Does it support JSON5?
The Fix JSON feature handles many JSON5 patterns (comments, trailing commas, single quotes) by converting them to valid JSON.
Can I fetch JSON from an API?
Yes. Paste any URL in the fetch bar and we'll retrieve the JSON response for you to format and explore.
How is this different from jsonformatter.org?
Faster UI, better error messages, tree view with path copying, auto-fix, dark mode, keyboard shortcuts, and completely private (no server processing).