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Reverse Engineers' Hex Editor vs Synalyze It! Pro: catalog facts
Reverse Engineers' Hex Editor	Synalyze It! Pro
Free Free and open source under GPL-2.0.	Paid Paid app, sold directly and on the Mac App Store.
Windows, macOS, Linux	macOS
Designed around reverse engineering work Extensible with Lua plugins	Automatic decoding of binary structures next to the hex view Grammars can be built interactively in the GUI
More than a casual user needs for simple byte edits	macOS only Paid software
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-2.0	License not stated
No account needed	Not stated if an account is 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.