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

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