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Formatter

JSON Formatter

JSON Formatter is a free online formatter that helps you pretty-print or minify any JSON document; validates structure and reports parse errors with position. JSON Formatter uses 2 input fields, returns 3 output values, and runs in your browser on the device.

Key facts

Inputs
2 fields: JSON and Output
Outputs
3 values: Formatted, Original size (chars), and Formatted size (chars)
Runtime
your browser on the device
Mode
Formatter
Privacy
Files and text stay in the browser session.
Cost
$0, no account required

How to use JSON Formatter

  1. 1

    Paste or fill in the input

    Enter your text or values into the input fields on the page.

  2. 2

    Run the utility

    Click Compute to run the utility in your browser and review the result.

  3. 3

    Copy the output

    Copy the output value you need from the result panel.

JSON Formatter details

First, enter JSON in JSON Formatter. Next, review Formatted, Original size (chars), and Formatted size (chars). Additionally, JSON Formatter uses 2 input fields and 3 output blocks so the result is easy to scan and copy.

Paste any JSON and reformat it with 2-space, 4-space or tab indentation, or minify it to a single line. Invalid JSON is reported with a clear error message and the position the parser stopped at. JSON Formatter runs entirely in your browser; your data stays on this page.

Common searches

  • json formatter
  • json beautifier
  • json prettifier
  • json pretty print
  • json minifier
  • minify json

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Frequently asked

What is JSON Formatter?

JSON Formatter is a free online formatter that helps you pretty-print or minify any JSON document; validates structure and reports parse errors with position. JSON Formatter uses 2 input fields, returns 3 output values, and runs in your browser on the device.

What inputs and outputs does JSON Formatter use?

JSON Formatter uses 2 input fields: JSON and Output. JSON Formatter returns 3 output values: Formatted, Original size (chars), and Formatted size (chars).

Do my files and data stay private?

Yes. JSON Formatter runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.

How do I use JSON Formatter?

Open JSON Formatter, paste or fill in the input fields, and the result updates instantly. JSON Formatter runs in your browser with no upload and no waiting.

Which browsers does JSON Formatter support?

Any modern browser works in Chrome, Firefox, Safari, and Edge on desktop and mobile. JSON Formatter uses standard web APIs and does not require any plugin, extension, or sign-up.