Open source file-converter projects
Every project in the registry tagged file-converter, ranked by real GitHub adoption.
Local Android file converter built with Kotlin and Jetpack Compose. Convert files on device, with no ads, accounts, or upload-based fallback.
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 file-converter projects are there?
This registry tracks 3 projects tagged file-converter, with 3,663 GitHub stars between them. The most-adopted is ZenConverter at 1,403 stars.
Are these file-converter projects free to use?
Yes — 3 of the 3 carry an explicit open-source licence across 3 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 file-converter 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 file-converter 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.