JSON Formatter & Validator

Format, validate, and beautify JSON data with syntax highlighting and error detection.

How to Use JSON Formatter & Validator

  1. 1Paste or type your raw JSON into the input editor.
  2. 2Select your preferred indentation (2 spaces, 4 spaces, or tabs).
  3. 3Click "Format" to beautify and validate the JSON.
  4. 4Copy the formatted output or download it as a .json file.
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Frequently Asked Questions

Is my data secure?▾
Yes, everything runs in your browser. Your JSON data is never sent to any server.
What's the maximum JSON size?▾
Limited only by your browser's memory. Most browsers can handle several hundred megabytes of text.
Can I minify JSON?▾
Yes, click the Minify button to remove all whitespace and produce the most compact JSON output.
How does this compare to JSONLint or other JSON tools?▾
Unlike server-based tools like JSONLint, this formatter processes everything in your browser with zero network requests. It combines formatting, minification, and validation in a single interface.
Can I use this tool on my phone?▾
Yes, the JSON formatter works in any modern mobile browser. The interface is fully responsive, so you can paste, format, and copy JSON on the go.
Can I copy or download the formatted output?▾
Yes. The output area includes a copy button that copies the formatted or minified JSON to your clipboard with one click, ready to paste into your code editor or API tool.
When should I use the JSON formatter?▾
Use it to debug API responses, clean up configuration files, validate JSON payloads before sending them to an API, or minify JSON to reduce file size for production use.