Subler
Subler is a macOS utility for creating, muxing, and tagging MP4 files with subtitles, chapters, audio tracks, and metadata.
What is Subler?
Subler is a native macOS media utility for preparing MP4 files for playback in Apple-oriented media libraries and devices. It helps users mux video, audio, subtitle, chapter, and closed-caption tracks into MP4 files, and it also provides editing tools for metadata used by media apps and players. This makes it useful for people who organize movie and TV files, clean up converted media, or add Apple-style tagging before importing files into their libraries. Subler supports importing tracks from formats such as MOV, MP4, and MKV, and it can create subtitle tracks compatible with Apple devices. It also includes metadata lookup for films and TV shows, which can speed up library organization. The app is published by I.D.&.A. di Galassi Damiano & C. S.a.s. and is focused on local media preparation rather than media playback.
Key features
- Mux video, audio, subtitle, chapter, and closed-caption tracks into MP4 files
- Edit iTunes-style metadata for movies and TV shows
- Create TX3G and WebVTT subtitle tracks for Apple-compatible playback
- Import tracks from MOV, MP4, and MKV sources
- Add or adjust chapters and embedded media information
- Look up metadata for movies and TV shows from online databases
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Safety overview
Status: Safe
Subler is a legitimate media-editing utility for macOS. It works with local media files and metadata, so the main practical concern is that editing or remuxing files can change output files if you overwrite originals. Keep backups of important media before batch editing or replacing tags, subtitles, or tracks.
Recommendation: Keep Subler if you use it to prepare or tag video files for your media library or Apple devices. If you no longer manage local MP4 media, you can remove it without affecting macOS, though you may want to keep any media files you created with it.
Common paths
/Applications/Subler.app
Preference paths
~/Library/Preferences/org.galad.Subler.plist
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