Minify and validate JSON in your browser, and see how many bytes you save.
How to use the JSON Minifier
Paste your JSON.
It is validated and minified automatically.
Copy the minified output and check the byte savings.
Frequently asked questions
It removes all unnecessary whitespace and line breaks, producing the smallest valid JSON with the same data, which is faster to transfer.
No. Only formatting is removed. Keys, values and types are preserved, and numbers are normalised by the JSON standard (for example 1.50 becomes 1.5).
You will see the parser's error message so you can fix it. Nothing is minified until the JSON is valid.
A JSON minifier that validates your JSON and strips every unnecessary character, then reports how many bytes and what percentage you saved.
It runs entirely in the browser using the native JSON parser, so the output matches what your code produces. For pretty-printing, use the JSON Formatter.
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