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UNetbootin vs Impression: catalog facts
UNetbootin	Impression
Free Free and open source under the GPL.	Free Free and open source under the GPLv3.
Windows, macOS, Linux	Linux
Runs on Windows, macOS and Linux with the same interface Optional persistence file keeps changes between boots	Minimal interface focused on one task Fits in with the GNOME desktop
Fails or produces unbootable media with several modern hybrid ISOs Development is slow and the interface is very dated	Linux only Fewer options than full-featured image writers
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License: GPL-3.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 23, 2026

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