JSON Minifier Online
Strip whitespace from JSON while validating structure. Perfect for API responses and config files.
Same browser tool as Code Minifier.
Drag and drop a file or paste up to 10 MB of code.
All minification and beautification runs locally in your browser. Your code is never uploaded or stored on a server.
About this page
JSON minification parses your input to ensure valid JSON, then outputs a compact single-line string.
Invalid JSON shows a clear error so you can fix syntax before compressing.
How to use
- Paste code or drop a file into the input area.
- Adjust minify options or switch to beautify mode if needed.
- Copy or download the result and review size statistics.
FAQ
- Does JSON minification change data values?
- No. Only whitespace is removed. Parsed values stay identical.
- Is my code uploaded?
- No. All processing happens locally in your browser.
- Is this tool free?
- Yes. No account is required.