JSON Formatter

Format, validate and inspect JSON data.

✓ No account↯ Mobile ready

Ready to start

Your input stays in this tab

JSON input

Validated outputUp to 2,000,000 characters are processed locally.

Formatted JSON will appear here.

Repeated runs always parse the original input.

HOW IT WORKS

How to use JSON Formatter

Paste JSONWhaleTu parses the original input locally without evaluating code.
Format or minifyChoose readable indentation or a compact valid JSON result.
Fix precise errorsInvalid input reports the parser message with line and column when the runtime provides a position.

Capability limits

Up to 2,000,000 characters.
Very deeply nested JSON may exceed the browser parser or serializer stack and is reported as an error.

COMMON QUESTIONS

Does this execute values inside the JSON?＋

No. It uses JSON parsing and serialization only.

Can I download the formatted result?＋

Yes. Valid output can be copied or downloaded as a JSON file.

Does JSON Formatter upload my data?＋

No. Processing happens inside this browser tab and input content is not included in WhaleTu analytics.

Is JSON Formatter free to use?＋

Yes. No account is required.

CAPABILITYformat

PROCESSINGlocal

INDEX STATUSCanonical tool page

LIMITS2 disclosed