JSON Minifier – Minify & Compress JSON Online
Free JSON minifier to remove whitespace and compress JSON. Validates input and produces compact, production-ready output.
JSON Minifier
The JSON Minifier removes unnecessary whitespace from JSON and produces a compact, single-line output.
It’s ideal for production APIs, configuration files, and data transmission where size and efficiency matter.
Minifying JSON does not change its structure or values—it only removes spaces and formatting.
How to use the JSON minifier
- Paste your JSON into the input field.
- Click Minify or wait for auto-minify.
- Copy the compact JSON output.
Common use cases
- Reduce API response size
- Optimize JSON for network transfer
- Prepare configuration files for production
- Store compact JSON in databases
- Share lightweight JSON payloads
Tips & notes
- Invalid JSON will return an error.
- Trailing commas are not allowed in JSON.
- Use the JSON Formatter if you need readable output instead.
Related developer tools
- JSON Formatter
- JSON Validator
- Base64 Encoder
- Base64 Decoder
FAQ
Does this tool validate JSON?
Yes. Invalid JSON will return an error instead of minified output.
Is my JSON stored or logged?
No. All processing happens instantly and nothing is saved.
Will minifying change my JSON data?
No. Minification only removes whitespace and line breaks.
Why should I minify JSON?
Minified JSON reduces file size and improves transfer performance.