SubFrenzy

The best listening practice? Repeat! Loop! No ads embedded! Subtitle-controlled audio/video forward/rewind. Enables single-sentence loop. Supports subtitle collection!

Add audio files (MP3 or M4A format) with corresponding subtitle files. During playback, subtitles are displayed in a list, supporting skip-ahead or rewind based on subtitle cues. Add video files (MP4) with corresponding subtitle files. During playback, subtitles are displayed in a list, supporting skip-ahead or rewind based on subtitle cues. Double-click a subtitle in the list to jump to the corresponding segment in the audio or video playback. Set the number of repetitions (3–99 times) for a single subtitle line to enhance listening training, with adjustable intervals to customize the rhythm for shadowing practice. Bookmark subtitles during playback, and practice them efficiently by batch-playing from the favorites list. Click on a subtitle to trigger word-by-word translation (local translation). Even without audio or video files, upload subtitle files alone to play subtitles using authentic American pronunciation powered by AI-trained models. Supports playback speed adjustment, software interface language settings, and more, with continuous updates. The software includes a user guide with detailed instructions and screenshots.