JSON formatter and beautifier
FavoriteJSON formatter online makes messy API data easy to read. Pretty print or minify JSON in your browser. Free, no sign-up, nothing leaves your device.
How it works
- 1
Enter your data
Text, a link, or settings — right on this page.
- 2
Instant result
Everything runs on your device. We do not get a copy.
- 3
Copy or save
Use it right away.
Need more room?
Pro lifts daily file caps. Plus adds keyword research when you outgrow free checks.
Why people use Toolsy
Fast
You get the result in a second. No waiting in a line.
Private
Browser tools stay on your device. Uploaded files are processed and discarded with the response.
No sign-up
Open the page and start. An account is only for paid plans.
Other tools
How a JSON formatter cleans up messy data
API responses often arrive as one long line. A JSON formatter breaks that into indented blocks so you can spot fields and typos fast.
Use Pretty when you are debugging or sharing a sample. Use Minify when you need a compact payload for a config file or request body.
Paste, pick Pretty or Minify, and copy. Invalid JSON shows a clear error. Nothing is uploaded and nothing leaves your browser.
Good for
- API debugging
- Config files
- Log review
- Code samples
Tips
- Paste raw response text
- Check error line numbers
- Minify before deploy
- Pretty print to spot typos
Common questions
What is a JSON formatter?
A JSON formatter adds spaces and line breaks so nested data is easy to read. It can also squeeze JSON into one short line.
How do I use a JSON formatter online?
Paste your JSON, click Pretty to expand it or Minify to shrink it, then copy the result. Everything runs in your browser.
Can a JSON formatter fix broken JSON?
It checks syntax and shows an error if a comma, quote, or brace is missing. Fix the spot it points to and try again.
Is this JSON formatter free?
Yes. No account, no daily limit, and your data never leaves your device.
What is the difference between a JSON formatter and a JSON beautifier?
They mean the same thing here: pretty print makes JSON readable. Minify removes extra spaces for smaller files.