Input (Pretty JSON)
1
Output (Minified)
Free Online JSON Minifier
Compress your JSON by removing all unnecessary whitespace, newlines, and indentation. This JSON minifier reduces file size for faster API responses, smaller payloads, and efficient storage. Also known as a JSON compressor.
Why Minify JSON?
- Reduce payload size for REST APIs by 30-60%
- Faster network transfer and lower bandwidth costs
- Save storage space in databases and caches
- Required for some configuration systems and CDNs
- Smaller JavaScript bundles when embedding JSON
How JSON Minification Works
The JSON compressor parses your JSON, validates it, then re-serializes it without any formatting characters. Spaces, tabs, newlines between tokens are removed while keeping the data identical. The output is a single-line compact JSON string.
Before vs After
A typical formatted JSON file can be reduced by 40-70% in size after minification. For example, a 10KB formatted JSON becomes ~4KB minified — perfect for API responses and embedded data.