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Online-Convert vs Convertio: catalog facts
Online-Convert	Convertio
Free Conversions can be done for free in the browser.	Freemium Free conversions in the browser, with paid plans for heavier use.
Web, Browser extension	Web
Handles audio, video, image and document formats in one place Presets for social and messaging services	More than 300 supported formats in one place Advanced options for many conversion types
Files must be uploaded to a third-party server Needs an internet connection	Files are uploaded to a third-party server Needs an internet connection
Web application, Browser extension	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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