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Subtitle Editffsubsync
Free

Free and open source under the MIT licence.

 Free

Free and open source.

Windows, macOS, Linux Windows, macOS, Linux, Command line
  • Waveform and spectrogram make timing subtitles straightforward
  • Reads and writes over two hundred subtitle formats
  • Automatic alignment without manual offsets
  • Works from the command line
  • Windows needs 10 version 22H2 or newer; older builds fail with a .NET error
  • macOS 12 is the minimum and macOS 14 or newer is recommended
  • Requires Python and ffmpeg
  • Cannot fix subtitles whose text does not match the audio
Downloadable app Downloadable app
Open source Open source
License: MIT License: MIT
No account needed No account needed
Works offline Works offline

Checked September 21, 2026

Checked October 1, 2026

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