Auto Subtitles
Free automatic subtitle & caption generator. Transcribe a video's speech in your browser, edit the lines, then download an SRT/VTT file or burn the captions into the video. No upload, no signup — the AI runs on your device.
🔒 100% private — your file is processed in your browser and never uploaded. The first run loads the converter engine (~30 MB), then it’s instant.
Free automatic subtitles & captions — in your browser
Drop in a video and DrawnColor transcribes the speech and generates timed captions, then lets you edit every line, download an SRT or VTT subtitle file, or burn the captions right into the video. The speech recognition runs entirely on your device — nothing is uploaded, and unlike most tools, it’s completely free.
How does it work without uploading?
It uses an open speech-to-text model (Whisper) running in your browser via WebAssembly. The first time, your browser downloads the model (about 40 MB) and caches it; after that it’s ready instantly.
Tips for the best captions
Clear speech with little background noise transcribes best. You can fix any word by editing the lines before you download the file or burn them in. Shorter videos process faster.
Frequently asked questions
Is the captioning really free and private?⌄
Yes. The speech-to-text runs entirely in your browser using an open Whisper model, so your video is never uploaded and there's no signup or paywall — unlike most caption tools that charge per minute.
What do I get out of it?⌄
A list of timed captions you can edit, plus a downloadable SRT or VTT subtitle file, or a new video with the captions burned in.
Why does it download something the first time?⌄
The first run downloads the speech-recognition model (about 40 MB) into your browser and caches it. After that, captioning starts straight away with no further download.
How accurate is it?⌄
It's very good with clear speech and light background noise, and you can fix any word by editing the lines before exporting. Quality depends on your audio and the language.
Have another question? Get in touch.