Create 7zip checksum in Windows

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In this post, I describe a quick way to create a checksum in Windows using the free GUI tool 7-Zip.

Checksums can be used to verify the integrity of files.  It can be useful to generate them when you are sharing files with others so they can check the file they receive hasn't been tampered with or corrupted.


Resolution

To create a checksum in Windows:

1. Download and install the free tool 7-zip

EDIT: 2. In 7-Zip v24, right click the file you want to generate a checksum for, go to 7-Zip then CRC SHA then *

Screenshot of the Windows Explorer right click menu with the 7-Zip and CRC SHA options open

(In earlier versions of 7-Zip, go directly to CRC SHA then *)

Screenshot showing the Windows Explorer right click menu with the CRC SHA option hovered

3. After a short time, the checksum is generated:

Screenshot showing 7-Zip checksum information

4. You can shift select all the rows and press CTRL-C to copy the information.


This post has been edited.  Thanks to the comment below for pointing out the difference in the context menu in the newer versions of 7-Zip.


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Comments

  1. Unknown6 February 2024 at 17:03

    Looks like you're using an old version of 7-Zip. Newer versions unfortunately have the "CRC SHA" context menu nested underneath the "7-Zip" context menu.

    ReplyDelete
    Replies
    1. Howard Simpson6 February 2024 at 18:25

      I just installed v23 on Windows and I'm not seeing the 'CRC SHA' context menu nested under the '7-Zip' context menu but perhaps you're using the v24 beta? Thanks for the heads up anyways!

      Delete

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