CyoHash is a simple shell extension that is used from within Windows Explorer to calculate the MD5 hash, SHA1 hash, or CRC32 checksum of a file. (Additional SHA256, SHA384, and SHA512 algorithms are available for users of Windows XP SP3 or newer.)


  • MD5
  • SHA1
  • SHA256
  • SHA384
  • SHA512
  • CRC32
  • Windows
  • Shell extension

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BSD License

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User Ratings

ease 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 5 / 5
features 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
design 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 5 / 5
support 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5

User Reviews

  • The application is helpful, thank you.

  • Very useful, easy to use

    1 user found this review helpful.
  • Works perfectly. You don't even need a readme.txt. I just downloaded it at 2:36PM and it's just now 2:39 and I managed to use download, install, find and use CyoHash to check the MD5sum of a Linux Mint distro, register on Sourceforge and come back to write this review! One of the fastest executables I have downloaded in a while.

    1 user found this review helpful.
  • Not that impressed. In fact bummed because after "much adoo" and my AV program said "do not install" ?! I trust so decided to download and install. BUT... no readme.txt file which would have been nice. CyoHash is only available by way of WinExplorer "when you highlight a particluar file". So take note of this...Right click on file and it will be listed. So to start I will give this a 1/10 rating. I will come back after I have some experience using it. Experience level in using this type of software or md5sum...Beginner using tutorials OK! I did install and ran a few hash checks and this does work well and is fairly easy to use for the beginner. REMEMBER to use Windows Explorer ( not IE !! ) and it should be listed on the drop down when a file is right-clicked on. I will now have to upgrade my initial eval to 6/10 stars AND will try to update this eval when I download bit torrents (which are notoriusly bad) and other programs which takes hours rather than minutes to dwnld...lots of bits and bytes! Thank you to the author and thanks to sourcefoge,net !!

  • great for non-GNU or non-UNIX users to verify file integrity after a download. Great job!

    1 user found this review helpful.
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Additional Project Details

Intended Audience

End Users/Desktop

User Interface

Win32 (MS Windows)

Programming Language