Lots of free hash file calculator available on Windows, MacOS, Linux and other operating system. There are many ways to verify hash on your operating system (OS) like Windows Command Prompt, Windows PowerShell, third party program and online hash file calculator. If the hash is the same, you can confirm that the file has not been tampered with or modified. To make sure the file you downloaded is the same as the one on the official site, you need to compare the hash on the official site with the hash you find on the file you downloaded to make sure it’s identical. Many websites provide a hash for file they have on the server. On the internet you can download a lot of files, but when it comes to know whether the file is from the official source or to ensure that the file has not been modified, you need to perform an integrity check.