Is my JSON secure?
Yes. Processing runs locally in your browser and no data is sent to a server.
JSON Minifier
Use the free JSON Minifier from FastOnlineTools. Simple, fast and secure directly in your browser.
How to use
- Paste your JSON into the input field.
- Click Minify.
- Review the compact output in the right panel.
- Copy the result for immediate use.
Features
- Removes unnecessary whitespace and line breaks from JSON.
- Valid JSON checks with clear error messages.
- Client-side processing for privacy and speed.
Frequently Asked Questions
Why do I see an error message?
The input is not valid JSON. Check commas, quotes and brackets.
Why should I minify JSON?
Minified JSON is smaller and better for APIs, files and faster transfer.