Remove all whitespace and formatting from JSON — minify large JSON payloads to reduce file size instantly.
Click the left panel and paste your data (Ctrl+V / Cmd+V), or use the Paste or Sample buttons.
Press the 🗜️ Minify JSON button. The result appears instantly in the right panel.
Any syntax issues in your input are shown in the red error bar with a clear description so you can fix them quickly.
Click Copy to copy to clipboard or Download to save the file locally.
It removes all whitespace — spaces, tabs, and line breaks — from JSON while keeping it 100% valid. The result is identical data in a smaller file.
No. Minifying only removes insignificant whitespace. All keys, values, arrays, and objects remain exactly the same.
Typically 20–40% smaller for human-written JSON with generous formatting. Programmatically generated JSON with minimal whitespace will see smaller gains.
Yes. All processing happens in your browser using JavaScript. Your data is never uploaded to any server.
The tool will show a clear error message with the line and position of the problem so you can fix it quickly.
Yes — there is no size limit. Paste any amount of JSON and it will be minified instantly.
