JSON Formatter

Parses strict JSON and serializes with two-space indentation.

Your inputs stay in your browser. No account required.

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How JSON Formatter works

Parses strict JSON and serializes with two-space indentation.

Try an example

{"a":1} becomes an indented object.

Good to know

Input stays in this tab and is never sent to analytics. Limit 100,000 characters. No input is executed. JSON numbers beyond JavaScript precision may be rounded; duplicate keys keep their last value.

Your privacy

Processing happens on this device for this tool. We do not upload your input, put it in share links or save it to your favourites. Closing this tab discards the working input; downloaded results remain wherever you save them.

When this tool is useful

Format JSON when a compact response needs to be read, reviewed or debugged without pasting it into a hosted service.

How to use it

Paste strict JSON into the editor; keep credentials and production secrets out of shared sessions.
Run the formatter and read the error location if parsing fails.
Copy the indented result or switch to the minifier when you need a compact payload.

Checks before you rely on the result

JSON is stricter than JavaScript: comments, trailing commas and unquoted keys are rejected.
Formatting changes whitespace, not the data model.
The input stays in the current browser tab and is never included in analytics.

This page is maintained with the tool implementation and its deterministic tests. If the result looks wrong, report the issue with a non-sensitive example.

Read the JSON Formatter instructions

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Made for clarity. Built to be useful.Report an issue