Toolbox

JSON Formatter

Format, validate, and minify JSON

JSON Formatter Online - Free & Private

Format, validate, and minify JSON data. All processing happens locally - your data never leaves your device.

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Input

Output

Formatted JSON will appear here

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JSON Examples

About JSON Formatter

Format, validate, and minify JSON data with ease. Perfect for developers working with APIs, configuration files, or any JSON data. All processing is done locally in your browser - your data never leaves your device for maximum privacy.

FreePrivateReal-timeNo UploadsSyntax HighlightingDownload JSON

About this JSON formatter tool

Use this free online tool to format, validate, and minify JSON. It works directly in your browser on desktop and mobile, with no installation and no sign-up.

How to use it

  1. Open the tool and add your file or enter your input.
  2. Adjust the options you need.
  3. Run the tool and download or copy the result.

Frequently asked questions

Is this JSON formatter tool free?

Yes. Toolbox is free to use with no account, no watermark, and no hidden limits on the page.

Are my files uploaded to a server?

Toolbox is designed to process files locally in your browser, so your content is not sent to a server for processing.

Can it find JSON errors?

Yes. Invalid JSON is flagged so you can fix it, and valid JSON is pretty-printed.

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