JSON Formatter
Format, beautify, validate, and minify JSON with clear, line-aware error messages. A fast, private JSON tool that runs entirely in your browser.
How to format JSON
- Paste your JSON into the box above.
- Click Beautify to indent it or Minify to compact it.
- If the JSON is invalid, you’ll see exactly what went wrong.
- Copy the result with one click.
Beautify vs. minify
Beautify adds indentation and line breaks so JSON is easy to read and debug. Minify strips all unnecessary whitespace to produce the smallest possible payload for APIs and storage.
Frequently asked questions
Does it validate my JSON?
Yes. Invalid JSON is rejected with a clear error message describing the problem so you can fix it quickly.
Is my JSON sent to a server?
No. All formatting and validation happen locally in your browser. Your data is never uploaded.
Can it handle large JSON files?
Yes, within your browser’s memory. Most realistic API payloads format instantly.