JSON Formatter & Validator
Paste your JSON — get instant formatting, validation, and stats. Beautify, minify, or explore your data in a tree view.
Input
Paste JSON here
Output
Formatted output will appear here...
✨
Instant Validation
See errors highlighted in real-time as you type. Exact line and column of syntax issues.
🌳
Interactive Tree
Explore your JSON as a collapsible tree. Navigate deep structures visually.
⚡
Client-Side Only
All processing happens in your browser. Your data never leaves your machine.
📊
JSON Statistics
Key count, max depth, array count, and character size — at a glance.
🗜️
Minify & Beautify
Compress for production or expand for readability. Configurable indentation.
🔐
Sort Keys
Alphabetically sort all object keys for consistent, diff-friendly output.
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Try DocuMint API — FreeFrequently Asked Questions
Is my JSON data secure?
Yes. All JSON processing happens entirely in your browser. No data is sent to any server. Your JSON never leaves your machine.
What's the maximum JSON size supported?
This tool handles JSON files up to several megabytes. For very large files (10MB+), you may experience slowness depending on your browser. Consider using a desktop tool for extremely large files.
Can I fix invalid JSON?
This tool shows you exactly where the error is (line and position) so you can fix it manually. Common issues: trailing commas, single quotes instead of double, unquoted keys, or missing brackets.
What's the difference between beautify and minify?
Beautify adds indentation and line breaks for readability. Minify removes all whitespace to produce the smallest possible output — ideal for APIs and storage. Both produce identical JSON data.
Why sort JSON keys?
Sorting keys alphabetically makes JSON deterministic — the same data always produces the same output. This is useful for version control diffs, caching, and comparing JSON objects.