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Zamzar vs SnapOtter: catalog facts
Zamzar	SnapOtter
Freemium Free for files up to 50 MB; larger files need a paid account.	Free Free and open source under the AGPL-3.0 licence; sponsorship is optional.
Web	Web, Self-hosted
Over 1100 supported formats No account needed for small files	More than 200 tools across image, video, audio and PDF Local AI for OCR, transcription and background removal
50 MB limit on the free tier Files are uploaded to a third-party server	Default admin/admin login must be changed after install AI tools need capable hardware, ideally a GPU
Web application	Self-hosted
Closed source	Open source
License not stated	License: AGPL-3.0
No account needed	Account needed
Needs internet	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.