JSON Formatter and Minifier
Paste JSON to pretty print it for readability or minify it for compact output. The tool runs entirely in your browser and can still point out syntax problems when the input cannot be parsed.
Input JSON
{
"name": "John",
"age": 30
}
Output JSON
Paste JSON on the left, then click Format or Minify to transform the result or see a detailed validation report.
Need to validate JSON?
Frequently Asked Questions
Does this JSON formatter upload my data?
No. Formatting and minifying happen entirely in your browser, so the JSON you paste stays on your device.
Can I minify JSON as well as pretty print it?
Yes. You can switch between formatted output for readability and minified output for compact storage or transport.
What happens if I paste invalid JSON into the formatter?
The formatter will not transform invalid JSON, but it will show line and column details along with a plain-language explanation so you can fix the syntax first.