PrivateYour video never leaves your browser
Captions for Video Ads
Most ads play muted. Add bold, on-brand captions so your message lands in the first seconds.
Drop a video or audio file
MP4, MOV, WEBM, MP3, WAV · up to 10 min on Free · no signup
01
Upload
Drop a video or audio file. It never leaves your device.
02
Edit & style
Fix any word, pick a caption style, adjust size and position.
03
Export
Download SRT/VTT free, or an MP4 with captions burned in.
Built for the first three seconds
Big, high-contrast captions help viewers get your hook immediately, even with the sound off.
On-brand styling
Match your brand colours and fonts, and keep captions clear of platform UI on every ad placement.
FAQ
Frequently asked questions
Is it really free?+
Yes. You can transcribe up to 30 minutes a day, edit your captions and download SRT, VTT or TXT files for free with no watermark. Exporting a video with burned-in captions is free at 720p with a small watermark; paid plans unlock 1080p, 4K and no watermark.
Is my video uploaded to your servers?+
No. Your video is processed entirely in your browser. Only a compressed audio track is sent for transcription, and it isn't stored afterwards.
Which file types can I upload?+
MP4, MOV, WEBM and MKV videos, plus audio files like MP3, WAV and M4A. Free accounts can upload videos up to 10 minutes long.