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Synalyze It! Pro vs Reverse Engineers' Hex Editor: catalog facts
Synalyze It! Pro	Reverse Engineers' Hex Editor
Paid Paid app, sold directly and on the Mac App Store.	Free Free and open source under GPL-2.0.
macOS	Windows, macOS, Linux
Automatic decoding of binary structures next to the hex view Grammars can be built interactively in the GUI	Designed around reverse engineering work Extensible with Lua plugins
macOS only Paid software	More than a casual user needs for simple byte edits
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0
Not stated if an account is 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.