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HxD vs Hex Fiend: catalog facts
HxD	Hex Fiend
Free Freeware at no cost.	Free Free and open source under the two-clause BSD licence.
Windows	macOS
Edits raw disks and RAM as well as files No limit on file size	Opens huge files without loading them into memory Insert and delete bytes, not just overwrite
Windows only Closed source	macOS only Focused on editing rather than full reverse-engineering features
Downloadable app	Downloadable app
Closed source	Open source
License: Freeware	License: BSD-2-Clause
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 1, 2026

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