JSON Minifier
Minify JSON to remove whitespace and shrink file size. Free online JSON minifier for faster APIs and smaller payloads. Runs in your browser.
About the JSON Minifier
Strip whitespace, line breaks, and indentation from JSON to shrink its size without changing the data. Smaller payloads mean faster API responses and lower bandwidth. Everything runs in your browser — nothing is uploaded.
Common use cases
- API payloads: reduce response size for faster transfers.
- Config bundling: ship compact JSON in production builds.
- Storage limits: fit data inside size-capped fields.
How it works
- Paste JSON, upload a file, or fetch it from a URL.
- Click Minify.
- Copy the result or save it, and check the size reduction.
Frequently asked questions
Does minifying change my data?
No. It only removes insignificant whitespace — the parsed values stay identical.
Is my data uploaded?
No. Minification happens locally in your browser — your data never leaves your device.