So much of our private information is stored online -- and unless we’re careful about our security, hackers and identity thieves can steal it.

We’ve all seen stories in the news about high profile leaks recently. Because of poor security on some major websites, thousands of people have ended up with their passwords and other details being bought and sold on the black market.

As a result, many people have had their emails, or even worse, their bank accounts hacked.

So we wanted to share this free and simple tool with you. It'll tell you if your personal details have ever been leaked. And if they have, we’ve added some security tips to keep you safe online in future.

All you need to do is click to check your email address. The tool will then make a quick search and tell you if your data has ever been leaked -- and if it has, through which site.

It’s fast, free, and completely safe - the check won't use any details other than your email address. Take a look!

Last year, tens of thousands of SumOfUs members signed and shared petition to stop the Snoopers’ Charter and thousands of you got in touch with your MP to ensure the bill got a strong, independent review. And right now we’re standing up against Theresa May’s reckless plans to crackdown on data encryption. Sign the petition here.