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