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ProgrammerKit

JSON Formatter & Validator

Format, beautify, minify and validate JSON instantly in your browser.

Free · Runs in your browser · Last updated

About this tool

A free online JSON formatter and validator. Pretty-print with adjustable indentation, minify for production, validate syntax with precise error locations. All processing is local.

Privacy

All processing for JSON Formatter happens locally inside your browser using JavaScript. Your input is never uploaded to a server, logged, or shared with third parties.

Frequently asked questions

Is the JSON Formatter free to use?

Yes. JSON Formatter is completely free for both personal and commercial projects. There are no usage limits, no sign-up, and no premium tier.

Is my data safe when I use JSON Formatter?

All processing happens locally in your browser using JavaScript. Your input is never uploaded to our servers, logged, or shared with any third party.

Does JSON Formatter work offline?

Once the page has loaded, the tool runs entirely client-side. You can disconnect from the internet and it will keep working in the same browser tab.

Which browsers are supported?

JSON Formatter works in all modern browsers, including the latest versions of Chrome, Firefox, Safari, Edge, Brave, and Opera, on desktop and mobile.

Do I need to install anything?

No. JSON Formatter runs in any modern web browser with no installation, browser extension, or account required.

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