JSON Minifier
Strip whitespace from your JSON to reduce payload size. See the original size, minified size, and percentage saved.
Minified output will appear here.
How to Use
- 1Paste your JSON into the input box.
- 2The minified result appears automatically on the right.
- 3Copy it or download it as a .json file.
Features
- Removes all unnecessary whitespace
- Shows original size, minified size, and percentage saved
- Copy and download the result
- Runs entirely in your browser
Example
Click Load Example to see a formatted JSON object minified instantly with a size comparison.
About This Tool
Minifying JSON removes whitespace, line breaks, and indentation that are useful for humans but add unnecessary bytes when the JSON is sent over a network or stored at scale. This tool strips that whitespace while preserving the exact data structure.
The size comparison shows the byte size of your input versus the minified output, calculated using the UTF-8 byte length so the numbers reflect real transfer size, not just character count.
FAQ
- Does minifying change my data?
- No. Minifying only removes whitespace between tokens; the parsed value is identical before and after.
- How much size reduction should I expect?
- It depends on formatting. Heavily indented JSON with long key names typically shrinks 10-30%, though results vary.