Is my JSON uploaded anywhere?

No. Everything is parsed and formatted locally in your browser with plain JavaScript — the data never leaves your machine.

What happens if my JSON is invalid?

You'll see the parse error and, when the problem can be located, a "Jump to line, column" link that moves your cursor straight to the offending character in the input.

Can it minify JSON instead of pretty-printing it?

Yes. Pick the "Minify" indent option to collapse the formatted output to a single line with no extra whitespace.

Does sorting keys change the meaning of my JSON?

No. Object key order isn't meaningful in JSON, so alphabetizing keys is purely cosmetic and safe to use on any valid document.

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JSON FORMATTER

Paste messy JSON and get it validated, pretty-printed, sorted, or minified — right here in your browser.

JSON input

Indent

Sort keys

Formatted entirely in your browser with plain JavaScript — nothing is uploaded anywhere.

How to format JSON

1
Paste your JSON into the input box, or click "Use sample" to try it out.
2
Pick an indent width — 2 spaces, 4 spaces, a tab, or minify to a single line.
3
Optionally turn on "Sort keys" to alphabetize object keys at every level.
4
Copy the formatted result or download it as a .json file.

Questions

Is my JSON uploaded anywhere?: No. Everything is parsed and formatted locally in your browser with plain JavaScript — the data never leaves your machine.
What happens if my JSON is invalid?: You'll see the parse error and, when the problem can be located, a "Jump to line, column" link that moves your cursor straight to the offending character in the input.
Can it minify JSON instead of pretty-printing it?: Yes. Pick the "Minify" indent option to collapse the formatted output to a single line with no extra whitespace.
Does sorting keys change the meaning of my JSON?: No. Object key order isn't meaningful in JSON, so alphabetizing keys is purely cosmetic and safe to use on any valid document.