Captioner

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