JSON Minifier

Minify JSON by removing whitespace and line breaks, and see how much smaller it gets.

Paste your input
Choose the options
Copy the output

Runs in your browser. Your data and files never leave your device.

About the JSON Minifier

Strip all unnecessary whitespace from JSON for smaller payloads and config values. The data itself is unchanged.

Example

A 2.4 KB formatted config becomes about 1.6 KB minified — every space, tab and line break outside strings is removed, while strings keep their spaces.

Frequently asked questions

Should I minify JSON for APIs?

Servers usually compress responses with gzip or Brotli, which removes most of the size difference. Minifying still helps for data embedded in pages, query strings and storage limits.

Can I get the formatting back?

Yes — paste the minified JSON into the JSON Formatter.

JSON Formatter & BeautifierFormat, beautify and pretty-print JSON with your choice of indentation, and pinpoint syntax errors.
CSS FormatterBeautify minified CSS into readable, indented rules.
JSON ValidatorCheck whether JSON is valid and find the exact line and column of any syntax error.
JSON to CSV ConverterConvert a JSON array to CSV for Excel or Google Sheets, flattening nested objects.
CSV to JSON ConverterConvert CSV (or TSV) to JSON, using the header row for keys and detecting numbers.
CSS MinifierMinify CSS by removing comments and whitespace, and see the size saving.

JSON Minifier

About the JSON Minifier

Example

Frequently asked questions

Related tools