Open source converter projects
Every project in the registry tagged converter, ranked by real GitHub adoption.
Collection of handy online tools for developers, with great UX.
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 converter projects are there?
This registry tracks 4 projects tagged converter, with 44,291 GitHub stars between them. The most-adopted is it-tools at 40,628 stars.
Are these converter projects free to use?
Yes — 4 of the 4 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 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 converter projects still maintained?
3 of the 4 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.