Captioner is a browser-based tool for generating and editing video subtitles with AI. Upload a video, get a transcript in the editor, and review text synced to timecodes.
Automatic subtitles for long videos
Captioner focuses on speech-to-text accuracy (around 98%) and broad language support, making it suitable for creators and teams working with multilingual content.
- Speech recognition accuracy around 98%
- Supports 98+ languages
- Processes videos up to 3 hours long
- No overall limit on total minutes processed
Editing, export, and translation
The built-in editor lets you quickly fix recognition errors and adjust phrasing before exporting subtitles or a captioned video.
- Edit subtitles directly in the browser
- Export subtitle files for YouTube (e.g., SRT)
- Export video with burned-in (open) captions
- Supports both closed and open captions
- One-click subtitle translation for faster localization
