Private AI Audio Tools in Your Browser
Subtitle Generator
Generate subtitles from audio or video using browser-based Whisper transcription. Generate subtitle-ready text while keeping source files on your device.
Private subtitle workflow
SRT and VTT export
Works with audio and video files
No signup or API key
Subtitle Generator Tool
Use the tool below to transcribe audio or video into timestamped text, then export SRT or VTT subtitle files directly from the result menu.
How It Works
Upload media
Choose an audio or video file you want to caption.
Run transcription
Whisper detects speech and creates timestamped segments.
Export captions
Download SRT or VTT for YouTube, TikTok, Reels, or editors.
Clean if needed
Use Subtitle Cleaner to remove timestamps or reformat caption text.
Best For
YouTube captions
Create caption files for long-form videos and Shorts.
Social clips
Generate subtitle files for TikTok, Reels, and short-form edits.
Accessibility
Add captions so videos are easier to watch without sound.
Subtitle Generator FAQ
Is subtitle generator private?
Yes. Subtitle generation starts from local browser transcription, so your source media stays on your device.
What subtitle formats can I export?
OfflineTTS exports SRT and WebVTT from the speech-to-text tool.
Can I clean existing subtitles?
Yes. Use the Subtitle Cleaner to strip timestamps, speaker labels, formatting, or duplicate lines.