Free Tools / JSON Minifier
JSON Minifier
Paste JSON to validate it and compact it into the smallest valid form. Runs entirely in your browser — nothing is uploaded.
Paste JSON to validate it and compact it into the smallest valid form. Runs entirely in your browser — nothing is uploaded.
Whitespace in JSON is optional. Removing it shrinks payloads, which helps with request size limits, query strings and storage.
Less to transfer on every request, especially for large arrays of objects.
Single-line JSON is easier to drop into a data attribute or an environment variable.
The tool parses before it minifies, so invalid JSON is reported rather than mangled.
Only whitespace is removed. Keys, values and ordering stay exactly as they were.
No. The output parses to exactly the same value; only insignificant whitespace is removed.
No. Key order is preserved.
No. Everything runs locally in your browser.
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