JSON Formatter & Validator
Tips:
- Paste minified or unformatted JSON to validate and beautify it
- Use Minify to compress formatted JSON
- Errors will be highlighted with their location
How the JSON Formatter Works
Paste in any JSON and this tool parses it to check it's valid, then lets you either pretty-print it with readable 2-space indentation or minify it down to the smallest possible size. If your JSON has a syntax error, you'll get a specific error message pointing at the problem instead of a generic failure.
Parsing and formatting both happen entirely in your browser — your data is never sent to a server.
Frequently Asked Questions
What happens if my JSON is invalid?
You'll see the specific parsing error, which usually points to the exact issue — a trailing comma, missing quote, or unmatched bracket, for example.
What's the difference between format and minify?
Format adds indentation and line breaks so the JSON is easy to read. Minify strips all unnecessary whitespace to make the payload as small as possible — useful before sending data over a network.
Does this send my data anywhere?
No — parsing and formatting happen entirely in your browser using JavaScript's built-in JSON support. Nothing is uploaded or logged.