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UltraEdit vs Skylark Editor: catalog facts
UltraEdit	Skylark Editor
Paid Commercial licence, sold alone or in the All Access bundle.	Free Free and open source under the GPL-3.0.
Windows, macOS, Linux	Windows
Handles very large files Text, code and hex editing in one program	Fast startup and portable Hex viewer alongside the text editor
Paid licence required Proprietary software	Windows only Smaller community and fewer extensions than mainstream editors
Downloadable app	Downloadable app
Closed source	Open source
License: Proprietary	License: GPL-3.0
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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