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Collision vs RapidCRC Unicode: catalog facts
Collision	RapidCRC Unicode
Free Free and open source under the BSD 2-Clause licence.	Free Free and open source under the GPL.
Linux	Windows
Simple graphical way to verify downloads No need for terminal checksum commands	Multithreaded hashing with asynchronous I/O Unicode-aware SFV and checksum files
Linux only Focused on hashing, with no other file tools	Windows only Source code documentation is sparse
Downloadable app	Downloadable app
Open source	Open source
License: BSD-2-Clause	License: GPL-2.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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