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JSON Minifier
Minify valid JSON and measure savings locally
Remove optional JSON whitespace, view byte and percentage savings, then copy or download compact JSON privately.
Result
Minified JSON output
No output yet.
Processing stays inside this browser.
Instructions
How to use JSON Minifier
Paste or choose valid JSON and select Minify JSON. Size statistics compare UTF-8 input and output bytes.
Real input and output example
A formatted object with line breaks becomes compact JSON such as {"active":true} without changing its data.
Diagnostics and limitations
What this tool reports clearly
Minification reduces optional whitespace only. It does not compress the downloaded file with gzip or change property names.
Privacy
Files are read with browser APIs and processing runs in a dedicated local Worker. Your JSON is never placed in a network request.
FAQ
Common question
Is minified JSON still valid?
Yes. The input is parsed before a standards-compliant compact serialization is produced.