📝 AI Subtitle Generator
Generate timed SRT and VTT subtitles.
Choose a file
Choose an audio or video file
For the first comparison, use Standard mode.
For stronger devices. Uses the Whisper Small model.
Mild rumble/DC filtering and level normalization before recognition.
Uses only the names and specialist terms you provide for conservative phonetic correction.
Generate timed captions with AI Subtitle Generator
AI Subtitle Generator recognises speech and creates timed caption segments. Download captions as SRT or VTT, or save the text as TXT. Import the caption file into a compatible editor or player; this tool does not burn captions into a video.
What can you use it for?
Create a first caption draft for your own tutorial video. After importing it, watch the video and correct names, punctuation and timestamps that do not fit.
How to use it
- Choose audio or video containing speech.
- Select the language and quality; try Standard first.
- Run processing and review the recognised text.
- Download SRT or VTT and check it alongside the video.
Tips for better results
Generate captions from the final edited audio. Later cuts can make previously generated timestamps drift out of alignment.
Limits and checking the output
Both wording and timing can be wrong. Singing, noise and overlapping voices reduce reliability. The output is not guaranteed to be verbatim or timed word by word.
Frequently asked questions
Should I choose SRT or VTT?
Follow the requirements of your destination. SRT works in many editors; VTT is common in web players.
Do I download a captioned video?
No. You receive a separate caption file to attach to the video or import into an editor.
Processing and privacy
Your selected file is processed in your browser on your own device; it is not sent to an external AI processing service. Loading the required model and runtime for the first use can take time and consume data. Speed depends on recording length, browser support and device resources. On mobile, try a short excerpt first, keep the tab open and save the result. See the privacy notice for other data processing on the website. Privacy notice.