root check

Check for changes to the external IP address and update a dynamic DNS service.

Check for plagiarism in articles, patents, books, essays, and term papers.

Check network connection and test connection speeds of various locations.

Check your hard disks for errors and correct them. Easy to use, fast and free.

Check if the food you buy contains additives dangerous to your health. Freeware!

Check that class target versions are as expected in a Java jar.

Check and track multiple keyword rankings on multiple search engines, Free!

Check your images to remove location-revealing tags before sharing online。

check email addresses from email lists, determine if the emails are valid.

Check that a server is sending the correct mime type for any given URL.