Comparing the checksum of a given file towards an expected checksum is only entirely meaningful if you compare every single digit. I don't think most people compare the entire checksum, just a view random digits.
It would be helpful if the checksum tool could compare a given checksum to the actual, calculated checksum.
Something like this: A textbox in which you can paste a string. The tool than compares all calculated chechsums to the string and either highlights a match or mismatches.



It looks simple and good for using, but it's pretty complicated for programming.
Maybe later.