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Ultimate Media Downloader vs OnionMedia X: catalog facts
Ultimate Media Downloader	OnionMedia X
Free Free and open source under the GPL-2.0-or-later licence.	Free Free and open source under the AGPL-3.0 licence.
Linux	Linux
Supports a large number of video and audio sites Simple basic downloader for quick use	Downloading and converting in one app Graphical interface instead of command line
Linux only Small repository with little visible development history	Smaller and younger than the original Windows edition Download support depends on upstream site changes
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0-or-later	License: AGPL-3.0-only
No account needed	No account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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