subsync

SubSync is an automatic subtitle synchronization utility that aligns subtitle files with the audio track of a movie or video. It can process audio in different languages, translating when needed, and can also synchronize one subtitle file against another reference subtitle. The tool detects character encodings automatically and offers a graphical interface for interactive use as well as a headless command‑line mode for batch processing.

The application targets users who need to correct timing mismatches in subtitles without manual editing, such as video editors, translators, and home‑theater enthusiasts. Its drag‑and‑drop support and language‑agnostic handling simplify the workflow for both single‑file and bulk operations.

Distinctive aspects include built‑in language translation using dictionaries, automatic encoding detection, and the ability to run without a GUI for scripting or server‑side tasks. The project is marked as no longer actively maintained, and its functionality may vary across environments.