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Free Hex Editor Neo vs Reverse Engineers' Hex Editor: catalog facts
Free Hex Editor Neo	Reverse Engineers' Hex Editor
Freemium Basic editing is free; advanced features require a paid edition.	Free Free and open source under GPL-2.0.
Windows	Windows, macOS, Linux
Handles very large files and disks Unlimited undo and redo with saved operation history	Designed around reverse engineering work Extensible with Lua plugins
Windows only Advanced features are reserved for paid editions	More than a casual user needs for simple byte edits
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.