These special values are used to check files for consistency and authenticity.

For Example: when download a file, you may see it's CRC32 or MD5 or SHA1 value published, so you can check your download file is valid.

You may select a file on the File to process box, or click the box's icon to browse for a file.

Choose the values you want to obtain checking proper box(es): CRC32, MD5 and SHA1.

If you want to compare results against specified values, you may enter proper values to compare on proper box to specify what value do you expect to obtain. This may be useful to check (with no mistakes and eyes saver) files downloaded, for example, Antivirus signature files. Just Copy and Paste to avoid retype of values and errors. If you don't want to compare values, just leave fields blank.

Click the Go button to start calculation, you'll see results on the list.

Priority allows you to set how your CPU will be used to perform calculations. From Idle (low CPU impact) up to Time Critical (extreme CPU usage). Default setting is Normal.