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JSON Formatter.

Format, validate and minify JSON online. Turn a compact API response into readable, indented JSON, or remove whitespace for a smaller payload. Processing happens in your browser.

Free to use Local processing No account required

SIMPLE BY DESIGN

How to use JSON Formatter

  1. Paste a JSON object, array or other valid JSON value into the text area.
  2. Select Format JSON to validate and indent the input with two spaces.
  3. Choose Minify if you need compact JSON without formatting whitespace.
  4. Copy the output for your editor, API client or documentation.

Make structured data easier to read.

Readable JSON makes it easier to inspect API responses, review configuration and locate nested values. This formatter parses your input with the browser’s JSON parser and serializes the result. Invalid JSON produces an error instead of a formatted result.

JSON requires double-quoted keys and strings. Comments and trailing commas are invalid. Avoid pasting integers beyond JavaScript’s safe integer range, because parsing can lose precision.

A FEW THINGS TO KNOW

A little more clarity.

Can it repair invalid JSON?

It validates JSON and reports parser errors. It does not automatically repair missing quotes, comments or trailing commas.

What does minify do?

Minify parses the JSON and removes unnecessary whitespace when serializing it. Whitespace inside string values is preserved.

Can I format sensitive JSON?

Your input is processed locally. Still, be careful with passwords, access tokens or personal data on shared devices or clipboard history.

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