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JSON formatter & validator

Pretty-print or minify JSON and validate it for syntax errors. Free, nothing sent.

JSON formatter & validator

Pretty-print JSON Indent formattingor onto a single line MinifyDone.
If there is a syntax error, Location and causethat tells you the Validator also serves this role.
For checking API responses and config files. Input is processed only in your browser (nothing is uploaded).

What is JSON Formatter?

A tool that pretty-prints (indents) JSON data, compacts it to one line, and checks for syntax errors. Use it to inspect API responses and config files.

How it works

1 Paste the JSON text.
2 Choose pretty-print or compact, and the result and error location are shown.

Frequently Asked Questions

Does it report syntax errors? ⌄

Yes. It marks the offending location.

Will Korean text break? ⌄

It keeps Korean intact while formatting.

JSON formatter & validator

JSON formatter & validator

What is JSON Formatter?

How it works

Frequently Asked Questions

Confirm deletion