Download CrcCheckCopy

CRC hash calculator and file folder comparisonCrcCheckCopy is a command-line utility for Windows and MacOS that lets you compare small or huge amounts of files in a very convenient way.

It can compare local folders, network shares, NAS folders, CDs, DVDs, external HDD drives, even folders on systems that are not connected between them.

The comparison is based on a small text file containing the CRC hashes of all the files and folders.

Two of the unique benefits of this file comparison utility is that you can send this file via email if you want to compare or verify files on a remote computer. Or you can store this text file together with your file set for future verification of its integrity.


The current version is completely free.

Donate QR code for CrcCheckCopy

If you find our file comparison utility useful, please consider making a donation. Any amount is important.

Donate to CrcCheckCopy
Click on the button above or scan the QR code to make a donation.

End-user license agreement

Before you download CrcCheckCopy you must read and make sure you agree to its End-user license agreement.

Please also check our privacy, personal data and telemetry information.


No special installation is needed. Just save it on a folder, from where you can call it from the command prompt or the MacOS terminal.

v2.1 for Windows
Windows 10
Windows 8.1
Windows 7
Windows Vista
Windows XP
Windows 8
v2.0 for MacOS
MacOS Big Sur (v11.0)
MacOS Catalina (v 10.15)
MacOS Mojave (v 10.14)
MacOS High Sierra (v 10.13)
MacOS Sierra (v 10.12)
OS X El Capitan (v 10.11)
OS X Yosemite (v 10.10)
OS X Mavericks (v 10.9)

After downloading the MacOS executable you must enable it to run as executable by running (only once) the command

chmod a+x CrcCheckCopy
Version history: 

See the version history on GitHub.


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