Swrice Tools JSON Minifier
Paste your JSON below, or upload a .json file, to strip out all unnecessary whitespace and see exactly how many bytes you save. Everything happens locally in your browser — nothing is sent to a server.
How to use the JSON Minifier
- Paste or type your JSON into the box above, or click Upload file to load a .json file directly.
- It minifies automatically as you type or upload, or click Minify.
- The result shows the original and minified size, and the percentage saved.
- Use Copy or Download to grab the compressed result.
Frequently asked questions
Is this JSON Minifier free to use?
Yes, it is completely free with no sign-up or usage limits.
Is my data uploaded anywhere?
No. Minifying happens locally in your browser using JavaScript — your JSON is never sent to a server.
Does minifying change my data?
No. Minifying only removes whitespace between tokens — every key, value and the original key order stays exactly the same. It is completely lossless, and you can always re-format the result later with the JSON Formatter to make it readable again.
Why would I minify JSON?
Smaller JSON means less bandwidth and faster load times for API responses and config files, since whitespace and indentation add up in files that are transferred often but rarely read directly.
Can I upload a file to minify?
Yes, click "Upload file" and choose a .json or .txt file. It is read directly in your browser — the file itself is never sent anywhere.