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alassJubler
Free

Free and open source under the GPL-3.0-or-later license.

 Free

Free and open source under the AGPL-3.0, funded by donations.

Windows, Linux, Command line Windows, macOS, Linux, Command line
  • Corrects subtitle offsets, cuts, and frame-rate differences
  • Can align subtitles in different languages
  • Supports more than 20 subtitle formats
  • Video preview, waveform and draggable timeline
  • Command-line interface
  • Linux use requires FFmpeg and ffprobe
  • Text-based subtitles only
  • Translation mode relies on Azure Translator
Downloadable app Downloadable app
Open source Open source
License: GPL-3.0-or-later License: AGPL-3.0
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked October 8, 2026

Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.