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JSON Formatter
Pretty-print, validate, minify, diff JSON in your browser.
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How to use JSON Formatter
About 5 seconds, start to finish.
- 1
Paste JSON
Drop any JSON — pretty-printed or minified, valid or broken.
- 2
Format or minify
Click Format to pretty-print with indent (2 or 4 space), or Minify to strip whitespace.
- 3
See errors inline
If JSON is invalid, we show the parser error with line + column.
- 4
Copy
Copy the result to your clipboard.
Frequently asked about JSON Formatter
Does my JSON get uploaded?
No. JSON Formatter runs entirely in your browser using the native JSON.parse. Your data never leaves the page.
What's the size limit?
Practical limit is your browser's memory — usually 50+ MB of JSON works fine. For massive files use jq from the command line.
Related tools
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