1. Damiano Galassi
  2. Subler


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Subler is a macOS app created to mux and tag mp4 files. The main features includes:

  • Creation of tx3g subtitles tracks, compatible with all Apple's devices (iPod, AppleTV, iPhone, QuickTime).
  • Mux video, audio, chapters, subtitles and closed captions tracks from mov, mp4 and mkv.
  • Raw formats: H.264 Elementary streams (.h264, .264), AAC (.aac), AC3 (.ac3), Scenarist (.scc), VobSub (.idx).
  • metadata editing and TMDb, TVDB and iTunes Store support.


  • Mac OS X/macOS 10.9 or later

The last version compatible with OS X 10.7 is 1.0.9

The last version compatible with OS X 10.6 is 0.31


Download Subler

Unidentified Developer

Since our download is not code signed, macOS will flag the application as from an unidentified developer. To work around this, please read their Open an app from an unidentified developer help article.



Srt File Format

Chapter Text Format

Release Notes

Subtitles Guide


The official channel is on irc.freenode.net (freenode network), channel #subler . Please be reasonable, this is a free project worked on by one person in his spare time.