JSON Formatter & Validator
Beautify, minify, and validate JSON with clear error messages — then copy or download the result.
Indent
Input
Output
Frequently asked questions
How do I format JSON?+
Paste your JSON and click Format. It's parsed, validated, and pretty-printed with your chosen indentation. Use Minify to strip all whitespace into a single compact line.
Does it validate JSON?+
Yes. If your JSON has a syntax error, you'll get a clear message including the line and column where parsing failed, so it's easy to fix.
Can I choose the indentation?+
Yes — 2 spaces, 4 spaces, or tabs. You can then copy the result or download it as a .json file.
Is my data sent to a server?+
No. All parsing and formatting happens in your browser — your JSON is never uploaded or stored, and the tool works offline.