JSON Formatter & Validator
Beautify messy JSON, minify payloads, validate syntax, and inspect nested data structures without leaving your browser.
Output
Formatted, minified, or validated JSON appears here.
Your processed JSON will appear here.
How to Use
- Paste your JSON into the input box.
- Choose your preferred indentation style: 2 spaces, 4 spaces, or tabs.
- Click Format / Beautify to pretty-print, Minify to compress, or Validate to check syntax.
- Review the validation message, output, and stats like depth, key count, and total size.
- Toggle Tree View to inspect nested arrays and objects node by node.
Frequently Asked Questions
What does a JSON formatter do?
A JSON formatter takes raw or minified JSON and rewrites it with indentation and line breaks so it is easier to read, debug, and share.
What is the difference between formatting and validating JSON?
Formatting changes the presentation of valid JSON, while validation checks whether the JSON syntax is correct. Invalid JSON cannot be formatted until the syntax error is fixed.
Why would I minify JSON?
Minified JSON removes unnecessary whitespace, which reduces payload size for APIs, config files, and data transfers while keeping the actual data unchanged.
Does this JSON validator send my data to a server?
No. The formatting, validation, and tree rendering all happen in your browser, so your JSON stays on your device during normal use.