Your videos in other languages, with an AI voice-over
Upload a video or audio file, see the price before anything starts, and download subtitles, a voice-over track or a finished MP4 in any of 38 languages. For YouTube channels, courses, training videos and podcasts.
40 free credits when you sign up. No card needed.
How it works
Four steps. You see the price before anything starts.
Add your video
Upload a video or audio file in a common format such as MP4, MOV or MP3.
Check the price
Vocnu measures the length and shows what each option costs in credits.
Choose language and files
Pick one of 38 languages, a voice and the files you need. Play a short sample of each voice before you choose.
Download
Get subtitles, the voice-over audio and a finished MP4. You can close the page while it works.
How long it takes
- 1 minute of videoabout 2 minutes
- 5 minutes of videoabout 4 minutes
- 20 minutes of videoabout 9 minutes
- 1 hour of videoabout 20 minutes
Measured on the live service with a feature film made into a Lithuanian voice-over video, from the start of processing (uploading not included). A short clip of a documentary narrated from start to finish takes about twice the time shown, a whole 44-minute documentary took 16 minutes, and times vary with how busy the service is.
What you get
Files that work on YouTube, in video editors and in any player. Choose any combination.
interview.es.srt
Translated subtitles
Timed to the speech, as SRT, VTT and ASS files. The original-language transcript is included.
interview.es.m4a
Voice-over audio
The translation read over the original sound, held at one steady level under the voice, the one recommended for your video or your own. As M4A, MP3, WAV, FLAC or OGG.
interview.es.mp4
Video with voice-over
Your video with the voice-over as the main audio and subtitles you can switch on or off; the original sound stays as a second track. As MP4, MKV, MOV, WebM or AVI.
interview.es.subtitled.mp4
Burned-in subtitles
Subtitles drawn into the picture, for platforms without subtitle support. They cannot be turned off.
interview.es.sdh.srt
SDH subtitles
Subtitles for deaf and hard-of-hearing viewers, with sound descriptions, speaker names and songs. Also in the spoken language itself.
Made for people who publish video
YouTube channels
Reach viewers who don't speak your language without recording anything again.
Courses and lectures
Turn one recording into lessons for students in other countries.
Product and training videos
Show your product and train teams in their own language.
Interviews and podcasts
Publish a translated edition with subtitles and a voice track.
Working from a terminal or an AI assistant? See the developer tools.
Questions and answers
More answers, step by step, are in the guides.
Which files can I upload?
Common video and audio formats such as MP4, MOV, MKV, WebM, MP3, M4A and WAV, up to 5 hours long.
How long does it take?
Usually less than the length of the video, and short clips take a few minutes. See the measured times under How it works. You can close the page and come back; the result waits in your account.
Does Vocnu use the subtitles and audio tracks already in my file?
Yes. If your file also carries subtitles (text or Blu-ray image subtitles) or audio in other languages, Vocnu reads them alongside the original speech: they settle names and meaning, fill in lines speech recognition missed, and give song lyrics and on-screen signs their translated subtitles.
Do you voice songs?
No. Songs, such as opening and ending themes, are not voiced: every line of their lyrics is translated in the subtitles, taken from your file's own song subtitles when it has them, and the song plays at full volume.
How long do you keep my files?
Uploads are deleted after 7 days and finished files after 30 days. Download what you need before then.
What happens if something goes wrong?
Credits are only charged when a job finishes. If it fails, the reserved credits go back to your balance automatically.
Do I need the rights to the video?
Yes. Only process content you own or are allowed to translate and adapt. Read the Acceptable Use & Copyright Policy.
Try it on your own video
Sign up, get 40 free credits and see the price for your video before you spend anything.
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