Do I need an account?

No. Guests can format JSON without signing in.

Does it validate JSON?

Yes. Invalid JSON shows an error instead of a result.

Yes. Minify removes unnecessary whitespace while keeping valid structure.

Is trailing-comma JSON accepted?

No. Standard JSON does not allow trailing commas; fix those before formatting.

JSON Formatter

In browser

Pretty-print, minify, and validate JSON in your browser.

Free for guests — processing stays on this device.

JSON

Result

Spec

Formats	JSON
Tool	JSON Formatter

Before you start

Paste JSON from an API or config file, format or minify it, and copy a clean result when it is valid. Invalid JSON shows an error instead of a misleading output.

Paste JSON into the input.
Click Format for indented output, or Minify for a single line.

While it runs

Fix any validation error, then copy the result.

Questions

Do I need an account?: No. Guests can format JSON without signing in.
Does it validate JSON?: Yes. Invalid JSON shows an error instead of a result.
Can it minify?: Yes. Minify removes unnecessary whitespace while keeping valid structure.
Is trailing-comma JSON accepted?: No. Standard JSON does not allow trailing commas; fix those before formatting.
Is it free?: Yes.

Nothing is uploaded. Parsing stays in your browser and is discarded when you leave the page.

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