Writer & Dev
Free JSON Formatter Online: Beautify & Validate JSON
Paste JSON to pretty-print, minify, or validate it. Invalid JSON shows a clear error with the line number.
Runs in your browser — your text is never uploaded or stored.
Quick answer
JSON Formatter is a free online tool that paste JSON to pretty-print, minify, or validate it. Invalid JSON shows a clear error with the line number.
- Cost: free, no signup or limits.
- Privacy: runs 100% in your browser; text is never uploaded.
- Works on: desktop and mobile browsers, offline once loaded.
- Category: Writer & Dev.
✓ Valid JSON
Output
Common conversions
How to Use
- 1.Paste your raw JSON into the input panel.
- 2.Choose Pretty-Print (2 spaces) or Minify.
- 3.Copy the formatted JSON — or read the parse error and fix the flagged line.
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FAQ
Does it validate JSON?
Yes — invalid JSON returns a specific parse error and the line number.
Can I minify JSON too?
Yes, toggle between pretty-print (2 spaces) and minified output.
Is my data uploaded?
No. Formatting happens locally with `JSON.parse` in your browser.
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