Shrink JSON payloads by stripping all whitespace and comments in one click. Ideal for reducing API response sizes and optimising data transfer. Instant, secure, browser-based processing.
Key Features
Removes all extraneous spaces, tabs, and line breaks
Calculates compression percentage and byte savings instantly
Validates JSON syntax before compressing to prevent corrupted payloads
Processed over HTTPS in memory; input is not stored
How to Use
Paste your formatted or spaced JSON into the input box.
Click the "Minify" button to compress the payload.
Inspect the byte count and size reduction metrics displayed.
Click "Copy" to copy the compact one-line string to your clipboard.
Example
Sample input
{
"id": 42,
"label": "widget"
}
Sample output
{"id":42,"label":"widget"}
Edge Cases
Already minified JSON (no extra savings)
JSON with escaped quotes in strings
Trailing whitespace-only lines
Frequently Asked Questions
Does minifying JSON change the data or data types?
No. Minification only strips insignificant whitespace between tokens, keys, and values. Numbers, booleans, null values, and string contents remain untouched.
Why should I minify JSON payloads?
Minified JSON reduces payload size in network transmissions, lowering bandwidth costs and reducing latency for REST and WebSocket APIs.
Can minified JSON be restored to formatted JSON?
Yes, you can paste the minified output into our JSON Beautifier tool at any time to restore readable indentation.
Privacy notice: when you run this tool, your input is sent over HTTPS to our server, processed in memory and returned. It is not stored or logged. Avoid pasting live secrets such as private keys or passwords.