This is a free service that shows whether your online accounts have likely been 'pwned,' or compromised in a data breach.

Have I Been Pwned just acquired a huge collection of unique email addresses and passwords that have been leaked and/or stolen ...

While there isn't one centralized database for all the stolen credentials on the web, one researcher has compiled quite a large database, that you can check to see if your email address is affected.

It has been reported that about 183 million Gmail accounts and passwords, were. Here is how to check if yours was affected.