Open source conversion projects
Every project in the registry tagged conversion, ranked by real GitHub adoption.
Calibre-Web but Automated and with tons of New Features! Fully automate and simplify your eBook set up!
A self-hosted, respource aware file conversion server supporting 488 formats in 26 languages.
Fast, standalone EPUB to Kobo EPUB conversion tool.
Related tags
Frequently asked questions
How many open source conversion projects are there?
This registry tracks 3 projects tagged conversion, with 8,551 GitHub stars between them. The most-adopted is Calibre-Web-Automated at 6,293 stars.
Are these conversion projects free to use?
Yes — 3 of the 3 carry an explicit open-source licence across 2 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which conversion project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these conversion projects still maintained?
2 of the 3 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.