Minify JSON Online
Pretty-printed JSON with indentation and newlines is easy to read but wastes bytes when transmitted over the network. JSON minification removes all unnecessary whitespace including spaces, tabs, and newlines while keeping the data structure and values completely intact. Minified JSON is the standard format for API responses, configuration files served over HTTP, and data files embedded in web applications. This tool minifies any valid JSON instantly, showing you the original and minified sizes so you can see the space savings. It also validates the JSON before minifying, so you get a clear error message if your input contains syntax errors. The minified output is equivalent JSON that parses to exactly the same data structure.
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FAQ
- How much does JSON minification reduce file size?
- It depends on the original indentation. JSON indented with 4 spaces sees 15-40% size reduction from minification. The savings are larger for deeply nested structures.
- Does minification change the data in any way?
- No. Only whitespace that is not inside string values is removed. All keys, values, and structure are preserved exactly. Parsing the minified JSON produces the identical data structure.
- Is minified JSON valid JSON?
- Yes. The JSON specification does not require whitespace. Minified JSON is fully valid and can be parsed by any JSON parser.