JSON Formatter

Paste JSON to make it readable, check that it is valid or make it as small as possible. Errors are shown with the exact line and column.

Paste or open your JSON
Format, minify or validate
Copy or download the result

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Your files never leave your device

Features

Format (beautify) with 2 spaces, 4 spaces or tabs.
Minify to remove all spaces and line breaks.
Validate with the exact line and column of any error.
Sort keys alphabetically to compare or clean up data.
Open .json files and download the result.

Common JSON errors

A comma after the last item of a list or object.
Single quotes instead of double quotes.
Keys without quotes.
Comments, which are not allowed in JSON.

Private

Kingdom of Files checks and formats your data on your device, so you can safely paste API responses, configuration files and data that contains private information.

Frequently asked questions

How do I find the error in my JSON?

Click Validate: the tool shows the line and column and selects the place of the error.

What is minified JSON?

The same data without spaces and line breaks, which makes the file smaller.

Can I sort the keys?

Yes. Turn on Sort keys before formatting or minifying.

Is my data sent to a server?

No. Everything happens in your browser.

Is there a size limit?

There is no fixed limit; very large files depend on your device's memory.

Is it free?

Yes.

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Features

Common JSON errors

Private

Frequently asked questions

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