Subtitle Generator
Generate, edit, and export timed subtitles from audio or video locally.
Subtitle Generator
Create editable subtitles from one audio or video file without uploading the media.
How to use
Add an audio or video file and choose the spoken language, or keep Auto.
Set the preferred maximum characters per line and select Generate subtitles.
Play the media, seek to a cue, and edit its text or start and end times.
Add, split, merge, delete, or shift cues until validation errors are resolved.
Download SRT, WebVTT, plain text, or JSON.
Supported input and limits
- Common WAV, MP3, M4A, AAC, OGG, Opus, FLAC, MP4, MOV, M4V, and WebM files.
- Up to 200 MB and 60 minutes per file.
- Processing is split into 10-minute windows and the result is limited to 10,000 cues.
The first run downloads the local FFmpeg, speech recognition, and voice-activity models. Keep the tab open. Later runs can reuse cached assets.
Privacy
Media, decoded audio, transcript text, timings, and exports remain on your device. Aiviko does not receive them.