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Rapid CRC Unicode Portable can run from a cloud folder, external drive, or local folder without installing into Windows. It's even better with the PortableApps.com Platform for easy installs and automatic updates.
Rapid CRC Unicode allows you to create and verify CRC, MD5, and SHA hashes within the files themselves or within sfv/md5/sha1/sha256/sha512 files. It features multi-threaded calculations for maximum performance. Both the 32-bit and 64-bit versions are bundled and the right one for your current PC is automatically used for the best in performance and compatibility.