JSON Minifier

Paste formatted JSON to strip all unnecessary whitespace.

Free · Runs in your browser · Your text is never uploaded

Messy one-line JSON turns into neatly indented, readable JSON

Why minify JSON?

Indentation and line breaks make JSON readable but add bytes. Minified JSON removes every optional space, so API responses, config files embedded in pages and localStorage values take less space and bandwidth. Typical savings are 10–30% before compression.

Minification does not change the data. Keys, values and order stay the same. Your JSON is validated at the same time, so a syntax error is reported with its line and column instead of producing broken output.

Need more options? Open the full JSON Formatter & Validator.

Frequently asked questions

How do I minify JSON?

Paste it above. The compact version appears immediately and can be copied.

Does minifying change my data?

No. Only whitespace outside strings is removed.

Should I minify JSON in production?

Usually yes for network payloads, although gzip or Brotli compression on your server matters far more.

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