Online JSON Formatter
Beautify, minify, and validate JSON data with multiple indent options and key sorting. 100% private, all processing in your browser
Instant Format
Paste to format, no click needed
Privacy First
Your data never leaves your device
Syntax Highlight
Clear colors to distinguish structure
Error Hints
Precisely locate JSON syntax errors
Frequently Asked Questions
Will formatting modify my JSON data?
No. Beautify only adjusts indentation and line breaks without changing the data. If 'Sort Keys' is enabled, object keys are reordered alphabetically, but values remain unchanged.
Will my data be uploaded to a server?
No. All formatting is done locally in your browser. Your JSON data never leaves your device, fully protecting your privacy.
What JSON formats are supported?
Supports standard JSON format including objects, arrays, strings, numbers, booleans, and null. Syntax errors are automatically detected and reported.
Can it validate JSON errors?
Yes. Pasted JSON is validated automatically. If there are errors, the specific message and location are shown for easy debugging.
Does it support large files?
It supports fairly large JSON files, but is limited by browser memory. We recommend processing data under a few MB at a time for smooth performance.
Is this tool free to use?
Completely free. This is a pure frontend online tool - no registration required, no payment needed, just open and use.
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