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Minify JSON

Paste your JSON and get a minified version with whitespace and comments removed to reduce file size and speed up page loads, with the bytes saved (gzip too) shown. JSON loses only its whitespace.

The whole process is client-side — nothing is uploaded and there's no account — so you can minify assets privately and instantly, drop several files for a ZIP, and compare input and output in Code Compare to check nothing changed.

Need another language or mode? See all formatters and minifiers.

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JSON Minifier — frequently asked questions

How do I minify JSON?
Paste your JSON into the left panel and the minified result appears on the right instantly. Copy it or download it as a file.
How is JSON minified?
Whitespace between tokens is removed and nothing else; invalid JSON is refused with the line and column of the problem.
Is my code uploaded anywhere?
No. Formatting and minifying run entirely in your browser with JavaScript — your code never leaves your device. It's free with no sign-up.

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