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JSON Minifier

Paste JSON and strip every unnecessary character. The result is the smallest valid representation of the same data.

Developer

JSON minifier

Local only
Everything stays in your browser

Your text is processed on your device — nothing is uploaded to a server.

Why minify JSON?

Minified JSON transfers faster and costs less bandwidth. Because whitespace carries no meaning in JSON, minifying never changes the data — only its size.

Invalid JSON

If parsing fails, the error message shows what the browser's JSON parser objected to. Common causes are trailing commas, single quotes and comments.

Good to know

Frequently asked questions

Does minifying change my data?

No. Only insignificant whitespace is removed; keys, values and ordering are preserved exactly.

Is my JSON uploaded?

No. Parsing happens on your device with the browser's own JSON parser.

How much smaller will it be?

Typically 10–30% for indented JSON, more for deeply nested structures.

Can I get it back formatted?

Yes — use the JSON Formatter tool to pretty-print the minified output again.

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