JSON Minifier
Compress JSON by removing whitespace
About this Tool
JSON Minifier is a free, privacy-first tool built for developers. Compress JSON by removing whitespace
All processing in your browser
Instant results, no delays
No signup, no limits
Upload or paste content
Saved locally for quick access
Disclaimer
This tool is provided for informational and educational purposes only. All processing happens entirely in your browser - no data is sent to our servers. While we strive for accuracy, please verify critical data before use in production environments. FormatKit is not responsible for any data loss, corruption, or issues resulting from tool usage.
How to Use JSON Minifier
Upload a JSON file or paste formatted JSON into the input area and click "Minify" to compress it to a single line, removing all unnecessary whitespace.
Features
- Instant minification as you type
- Size reduction statistics showing bytes and percentage saved
- Copy minified JSON with one click
- Download as .json file
- Handles large JSON files efficiently
Common Use Cases
- Reduce file size: Compress JSON for faster network transmission
- Production optimization: Minify JSON for deployment to reduce bandwidth
- API payloads: Reduce payload size for mobile apps and slow connections
- Storage optimization: Save space when storing JSON in databases or files
FAQ
Q: Does minification affect JSON validity?
No, minification only removes whitespace. The JSON structure and data remain identical.
Q: How much space can I save?
Typically 20-60% depending on indentation level. Deeply nested JSON with lots of whitespace saves the most.
Q: Can I minify already minified JSON?
Yes, but there won't be any size savings since whitespace has already been removed.