JSON Formatter
Format, validate and minify JSON with custom indentation
JSON Formatter Online - Free Format & Minify
Format, validate and minify JSON online with our professional tool. Automatic syntax validation with error reporting. Customizable indentation. Perfect for developers working with REST APIs, configuration files and JSON data. Everything happens locally for maximum security.
How It Works
- Choose whether you want to format (make readable) or minify (compact) the JSON
- If formatting, select your preferred indentation (2, 4, 6 or 8 spaces)
- Paste your JSON code in the input area
- Click the button to process - validation is automatic
- Copy the formatted or minified result to your clipboard
Frequently Asked Questions
What is JSON formatting?
JSON formatting (or pretty print) transforms compact JSON into a readable version with indentation and line breaks. This makes it much easier to read and debug complex JSON data. The opposite is minification, which removes unnecessary spaces to reduce file size.
How do I validate if my JSON is correct?
Just paste the JSON in the tool and click "Format" or "Minify". If the JSON contains syntax errors (missing commas, unclosed parentheses, wrong quotes), you'll see an error message with the approximate position of the problem. If the conversion succeeds, the JSON is valid.
When to use Format vs Minify?
Use Format when you need to read, modify or debug JSON - it makes the code human-readable. Use Minify before sending JSON over the network or saving it to production - it reduces file size by removing unnecessary spaces, improves performance and reduces bandwidth.
Is it safe to use this tool with sensitive data?
Yes, absolutely safe. All processing happens locally in your browser using JavaScript. Your JSON is never sent to our servers or third parties. We don't save any data. You can also use the tool offline once the page is loaded.