JSON formatter and validator

Format, check and minify JSON, including structured data.

How to use it

Fill in or change the details in the form. We have added example values so you can see how it works.
The result updates as you type. Nothing is sent anywhere: it all runs in your browser.
Copy or download the result and use it straight away.

Is this tool free?

Yes. All AMJAM tools are free, with no sign-up and no limits.

Is my information private?

Yes. Everything you type or upload stays on your device. We do not store or see it.

Can you do this for me?

Yes. Our team handles website development for businesses across India. See the service or book a free call.

Calculate the conversion rate of a website, landing page or ad.

Turn visitors into leads, customers and revenue, and see what a small improvement is worth.

Find out whether version B really beats version A, with a confidence level.

Work out how many visitors you need before an A/B test result can be trusted.

Get headline ideas built around the result your customers want.

Design a button, check its contrast and copy the HTML.

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