Minified API responses and config files are hard to read at a glance. Paste JSON here and it's instantly validated and pretty-printed with proper indentation — or, if something's syntactically wrong, you get a clear error instead of a silent failure. All parsing happens locally using your browser's built-in JSON engine.
How to use the json formatter tool
- 1
Paste your JSON
Drop in raw or minified JSON.
- 2
Read the result
Valid JSON is instantly pretty-printed; invalid JSON shows exactly what's wrong.
- 3
Copy or download
Grab the formatted output, or minify it back down with one click.
Common use cases
Debug an API response
Paste a minified API payload to read it in a readable, indented format.
Validate before committing
Check a config or data file is syntactically valid JSON before saving it.
Shrink a payload
Minify JSON to reduce its size before sending or storing it.
Frequently asked questions
The tool shows the exact parser error message, which usually points to the character position where something's wrong.