JSON Formatter
Format, pretty print and minify JSON with adjustable indentation. Catch errors instantly with clear feedback. Free.
JSON Formatter Online — Pretty Print & Minify
Hand-edited JSON is where bugs quietly live — a missing comma, a stray brace. JSON Formatter validates your input, pretty-prints it with the indentation you choose, and minifies it for production, all in the same screen.
How to use
- 1Paste your JSON
Enter JSON from an API, a copy, or a config file.
- 2Pick indentation and Format
Set the indentation size to match your style and click Pretty Print.
- 3Minify for production
Click Minify for a compact version with no spaces or line breaks.
- 4Fix errors if any appear
Mistakes are flagged instantly with a message that points to the problem.
Frequently asked questions
Can it detect errors in JSON?
Yes. Validation runs instantly with a message showing where the problem is.
When should I minify?
For production — removing spaces and line breaks makes the data smaller.
Can the indentation be adjusted?
Yes, to match your team's coding style.
Is my data sent to a server?
No, all processing happens in your browser.
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