Purpose: Beautify and validate JSON with proper indentation, and instantly see syntax errors.
JSON Formatter
The JSON Formatter beautifies, indents, and validates JSON, turning a minified or messy blob into clean, readable structure and flagging syntax errors as it goes.
Readable JSON in one click
Paste raw JSON - such as an API response - and the formatter re-indents it with consistent spacing and line breaks so you can actually read the structure. If the JSON is invalid, it points to the problem (a missing comma, bracket, or quote) instead of failing silently, which makes debugging much faster.
Format and minify
You can pretty-print for reading or switch to minified output for production. Because it validates as it formats, it doubles as a quick JSON linter. To shrink JSON specifically, the JSON Minifier is the companion tool. Everything is processed locally, so sensitive payloads stay private.
Frequently Asked Questions
Does it validate JSON as well as format it?
Yes. If the JSON is invalid it reports the error location, so it doubles as a quick validator.
What is the difference between formatting and minifying?
Formatting adds indentation and line breaks for readability; minifying strips whitespace to reduce size for production.
Is my JSON sent to a server?
No. Formatting and validation happen in your browser, so your data stays private.
Can it handle large JSON files?
Yes, it handles sizeable payloads, limited mainly by your browser's memory.
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