Does this validate JSON, or just format it?

Both — it parses the input with a real JSON parser first, so invalid JSON shows a real error message instead of silently producing broken output.

What indentation does the pretty-printed output use?

Two spaces per level, a common convention for readable JSON, matching how most API documentation and tooling formats it.

Does minifying change the data?

No — minifying only removes whitespace and formatting; every key, value and structure stays exactly the same as the parsed input.

Does it store or send my JSON anywhere?

No — parsing and formatting both happen entirely in your browser, useful for a payload you don’t want leaving your machine.

Can I use this for a webhook payload I received?

Yes — pasting a real webhook delivery body is exactly the kind of nested, hard-to-read JSON this tool is meant to make readable.

Does it support JSON with comments?

No — it uses standard JSON parsing, which does not allow comments; strip any comments first if your source has them.

Free tool

JSON formatter

Pretty-print, validate and minify a JSON payload using the browser’s own real JSON parser, useful for reading a webhook delivery or an API response body — SkedCast’s own /v1 API sends every response as JSON. Invalid JSON shows a real parser error message instead of a blank result, and switching between the pretty-printed and minified view happens instantly, entirely in your browser.

Paste JSON

{
  "event": "post.scheduled",
  "postId": "abc123",
  "scheduledAt": "2026-09-23T00:00:00.000Z"
}

How to use the JSON formatter

Paste your JSON. Enter or paste the JSON payload, such as a webhook body or API response.
Check for a parse error. An invalid payload shows a real error message instead of formatted output.
Switch between pretty-printed and minified. Toggle the view depending on whether you want readability or compactness.
Copy the result. Click copy to take the formatted or minified JSON for wherever you need it.

Worked examples

Pretty-printing a compact payload

{"a":1,"b":[1,2,3]} pretty-prints to 2-space-indented JSON across 8 lines, exactly matching how `JSON.stringify(value, null, 2)` would format the same parsed value.

A real webhook-shaped example

Pasting {"event":"post.scheduled","postId":"abc123","scheduledAt":"2026-09-23T00:00:00.000Z"} formats it cleanly for reading, the same event shape SkedCast’s own webhooks send.

JSON formatter FAQ

Does this validate JSON, or just format it?: Both — it parses the input with a real JSON parser first, so invalid JSON shows a real error message instead of silently producing broken output.
What indentation does the pretty-printed output use?: Two spaces per level, a common convention for readable JSON, matching how most API documentation and tooling formats it.
Does minifying change the data?: No — minifying only removes whitespace and formatting; every key, value and structure stays exactly the same as the parsed input.
Does it store or send my JSON anywhere?: No — parsing and formatting both happen entirely in your browser, useful for a payload you don’t want leaving your machine.
Can I use this for a webhook payload I received?: Yes — pasting a real webhook delivery body is exactly the kind of nested, hard-to-read JSON this tool is meant to make readable.
Does it support JSON with comments?: No — it uses standard JSON parsing, which does not allow comments; strip any comments first if your source has them.

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