Audio to Subtitle
AICreate timed subtitles from audio using AI speech detection
About Audio to Subtitle
Subtitles make videos watchable with the sound off and accessible to more viewers, but typing and timing them by hand is painfully slow. Generating timed subtitles directly from your audio saves hours of tedious work.
This tool uses AI speech detection to create timed subtitles from your audio. It works in your browser, free, with no signup and no watermark. Your file is processed privately, producing subtitles aligned to when each line is spoken.
Common uses
- Generate subtitles for a video from its audio track
- Make spoken content accessible with on-screen text
- Add captions for viewers watching without sound
- Speed up subtitling instead of timing lines manually
How to use
- 1
Upload your file
Click the upload area or drag & drop your file. Supports *. Up to 50 MB.
- 2
Click "Process — Audio to Subtitle"
Click the process button. Your file is converted instantly on our secure servers.
- 3
Download your result
Preview and download your converted file. No watermarks, no quality loss, no expiry.
Why ToolHub?
- 100% Free — no hidden fees or subscriptions
- No signup required — start instantly
- Supports MP3, WAV, AAC, FLAC, OGG, M4A, OPUS and more
- High quality audio output with original fidelity
- Fast cloud processing — most conversions under 10 seconds
- Files deleted after download for privacy
- Batch conversion supported
FAQ
How are the subtitles timed?
The AI detects speech in your audio and aligns the text to when it's spoken, so each subtitle line appears at the right moment.
How accurate is the timing and text?
Clear audio produces well-timed, accurate captions, while noise or overlapping voices may need small adjustments.
Is it free?
Yes, free with no signup and no watermark.
Can I use Audio to Subtitle on mobile?
Yes — ToolHub is fully responsive and works on iPhone, Android, tablets and all modern browsers. No app install needed.