Jubler
Jubler is a free, open-source subtitle editor for creating and editing text-based subtitles. It supports multiple subtitle formats including SubRip (SRT), Advanced SubStation Alpha (ASS), SubStation Alpha (SSA), SubViewer, MicroDVD, MPL2 and Spruce DVD Maestro. The tool offers features for time-shifting, synchronising subtitles with video, frame rate conversion, spell-checking in multiple languages, and graphical preview using FFMPEG. It also supports translating mode with parent and child editors. Jubler is used by subtitle creators, translators, and video professionals who need precise subtitle editing and format conversion capabilities.
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1 suggestionJubler has been discontinued by its developer and is no longer actively maintained. The latest version 9.0.1 does ship a macOS build that includes a Universal Binary option, meaning a native Apple Silicon version exists — however, because the project is no longer under active development, you should not expect any future updates or bug fixes. Since the app is effectively abandoned, it will stop launching entirely when Apple removes Rosetta 2 in macOS 28 (September 2028), giving you approximately 27 months to migrate your workflow. If Jubler's feature set is essential to your subtitle work, consider moving to an actively maintained alternative such as Subtitle Edit (free, open-source, with native macOS support) or Aegisub (free, community-supported, runs natively on Apple Silicon). Both handle all the common subtitle formats that Jubler supports. If you prefer to stick with Jubler while it still works under Rosetta, ensure you download the Mac Universal Binary version from videohelp.com rather than the Intel-only macOS 64-bit build, as that will give you native Apple Silicon performance today.
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