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Domain Age Checker is an online free tool that helps you to check domain age, to check domain expiration date, and when was a website created. It also tells about when the domain was updated. This tool is straightforward to use, and it's free.
The answer is very simple to the question, how to check when a website was created? Just paste your website URL in the URL field, then fill the Google-captcha (Are you a robot?), then finally hit the "Check domain age" button.
It shows the domain registration, domain update, and the domain expiration date at the output page.
This tool shows the domain expiration date, and update date with domain registration details. There is no need to perform domain expiry check separately. You can check these both terms within the single domain age check process.