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CHK Hash Tool vs RapidCRC Unicode: catalog facts
CHK Hash Tool	RapidCRC Unicode
Free Free to use freeware.	Free Free and open source under the GPL.
Windows	Windows
Portable, no installation needed Many hash algorithms including BLAKE3 and xxHash3	Multithreaded hashing with asynchronous I/O Unicode-aware SFV and checksum files
Windows only Closed source	Windows only Source code documentation is sparse
Downloadable app	Downloadable app
Closed source	Open source
License: Freeware	License: GPL-2.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.