Translate any video with an AI voice-over.
A natural voice reads the translation over the lowered original sound, with subtitles, in 35 languages. Watch YouTube and other sites with the browser extension, or upload a video or audio file and see the price before you start.
The browser extension works in Chrome, Brave and Edge on a computer. 40 free credits when you sign up. No card needed.
The Vocnu extension in under a minute A film scene on YouTube in English, then with a Spanish voice-over and subtitles, and a look at the extension's languages, voices, prices and subtitle colours.
Film: Breakfast at the Bodega (2022), directed by Marina Elise Barham, written by Cameron Strittmatter & Marina Elise Barham, CC BY 3.0 Music: “One Cool Minute” by Loyalty Freak Music, CC0 1.0 AI voice-over and subtitles added by Vocnu.
Watch any video in your language
The Vocnu extension for Chrome, Brave and Edge voices the videos you watch in your browser and shows subtitles in your language: YouTube, online courses, any page with a video player.
Any video player
YouTube, sites with subtitles, plain video files, videos told only in text on screen, DRM-protected streaming players and live streams.
In sync with the picture
Vocnu voices the video ahead of the picture. After a short wait at the start, the voice keeps up with what you see and follows pauses, seeking and speed changes.
35 languages
One voice reads the translation over the lowered original sound, and subtitles in your language stay on screen, in fullscreen too.
From 0.5 credits a minute
2 credits a minute with Premium voice-over (1 credit when Vocnu reuses one it already made of the video), 1 credit with Standard and 0.5 credits with Economy, which live mode does not offer. Subtitles only cost 1 credit a minute, or 0.5 credits in Economy. A video already in your language is never voiced or charged, and watching it again within 30 days is free.
About the extensionAdd from the Chrome Web Store
For Chrome 120 or newer, Brave and Edge on a computer.
Hear it on real film scenes
Scenes from openly licensed films, voiced by Vocnu in 16 languages. Switch the language or the voice while a scene plays.
Breakfast at the Bodega (2022), directed by Marina Elise Barham, written by Cameron Strittmatter & Marina Elise Barham — CC BY 3.0 AI voice-over and subtitles added by Vocnu. License
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 35 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.
This is voice-over, not dubbing: one clear voice reads the translation, and the original sound stays at one steady, lower level while the voice speaks, the short pauses between lines included, the way TV documentaries do it. Vocnu recommends that level from how loud the video's own speech is, lower for a loud talk than for a film, and you can set your own.
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.
35 languages
The spoken language is detected automatically. Translate it into any of these, with voice-over and subtitles in each.
EnglishWait. Can you hear that?
Palauk. Ar tu tai girdi?
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.
Developer tools
Translate videos from your terminal or your AI assistant. The command line and MCP server, an npm package, use a personal token from your account and show the price before anything is charged.
Command line
Upload a file of up to 10 GB, see the price, translate it and download the results with one command. The npm package is MIT-licensed.
npx vocnu translate film.mkv --to esMCP server
Add Vocnu to any assistant or tool that supports MCP. It uploads a video from your computer, tells you the price, starts only when you agree and saves the files when they are ready.
VOCNU_TOKEN=… npx -y vocnu mcpAPI tokens
Create a token in the app under Settings, API & MCP and sign in with it once. It can upload files, show prices, start and download jobs, but it cannot pay or change your account.
npx vocnu login
Three grades of voice-over
Choose for each video how it is read. Premium is the default; Standard and Economy cost fewer credits. Timing, formats and the browser extension work the same in every grade.
Premium
DefaultOur most natural voices and finest translation.
2 credits a minuteof voice-over, or 1 credit when the browser extension replays a minute Vocnu already voiced
- Natural, expressive voices that carry the tone of each line
- Our finest translation, which subtitles use too unless you choose Economy
- Best for films, series, anime and anything you share
Hear a sample
Standard
Clear voices and good translation for fewer credits.
1 credit a minuteof voice-over, also when the browser extension replays a minute Vocnu already voiced
- Two clear voices in each language, a female and a male one, with plainer delivery
- Good translation by smaller models, which now and then slip in meaning or grammar
- Good for lectures, courses, news and long videos you watch to follow along
Hear a sample
Economy
The lowest price. A plain synthetic voice reads a quick translation, good for following a video.
0.5 credits a minuteof voice-over or subtitles alone, also when the browser extension replays a minute Vocnu already voiced
- Plain synthetic voices with a flat delivery, a female and a male one in each language, none yet in Croatian and Slovenian
- A quick translation by small models, which slip in meaning or grammar more often than Standard’s
- Good for talks, streams and videos you watch once, when the price matters most
Hear a sample
The same scene in each grade
A short German interview, voiced and subtitled once in each of the three grades.
„Was macht ein Roboterforscher?“ – ZDF/logo/Simone Klein – CC BY 4.0. Excerpt; not endorsed by ZDF or the interviewee. AI voice-over and subtitles added by Vocnu. License
The same in every grade
- Burned-in subtitles, re-encoded video and SDH subtitles at the same price
- Speech recognition, timing, the mix with the original sound and every file format
- The browser extension and watching again for free within 30 days; its live mode reads Premium or Standard
- Refunds when a job fails, packs and plans, and 40 free credits for new accounts
Subtitles on their own cost 1 credit a minute with Premium’s translation or 0.5 credits with Economy’s; those of a voice-over use its grade’s translation.
Your account remembers the grade you chose last, in the app and in the browser extension. Premium is the default.
What a video costs in each of the three grades
In credits, and in money from the cheapest credit, in the Studio plan, to the dearest, in the Episode pack.
| Video | Premium | Standard | Economy |
|---|---|---|---|
| Anime episodeabout 24 minutes | 48 credits€2.80 to €4.80 | 24 credits€1.40 to €2.40 | 12 credits€0.70 to €1.20 |
| Filmabout 2 hours | 240 credits€13.98 to €24.00 | 120 credits€6.99 to €12.00 | 60 credits€3.49 to €6.00 |
Pay only for the minutes you use
Buy credits once or every month, and spend them on any video. Credits never expire.
Credit packs
- Episode50 credits€5€0.10 per credit≈ 1 anime episode or 2 YouTube videos with Premium voice-over≈ 25 min of Premium, 50 min of Standard or 100 min of Economy voice-over video
- Long episode120 credits€10€0.083 per credit≈ 1 TV episode, 1 podcast episode, or 6 YouTube videos with Premium voice-over≈ 60 min of Premium, 120 min of Standard or 240 min of Economy voice-over video
- Movie250 credits€18€0.072 per credit≈ 1 film, 2 TV episodes, or 12 YouTube videos with Premium voice-over≈ 125 min of Premium, 250 min of Standard or 500 min of Economy voice-over video
- Creator550 credits€39€0.071 per credit≈ 2 films, 5 TV episodes, or 27 YouTube videos with Premium voice-over≈ 275 min of Premium, 550 min of Standard or 1,100 min of Economy voice-over video
- Studio1,500 credits€99€0.066 per credit≈ 6 films, 15 TV episodes, or 75 YouTube videos with Premium voice-over≈ 750 min of Premium, 1,500 min of Standard or 3,000 min of Economy voice-over video
Monthly plans
- Viewer300 credits every month€19/month€0.063 per credit≈ 1 film, 3 TV episodes, or 15 YouTube videos with Premium voice-over≈ 150 min of Premium, 300 min of Standard or 600 min of Economy voice-over video
- Fan650 credits every month€39/month€0.06 per credit≈ 2 films, 6 TV episodes, or 32 YouTube videos with Premium voice-over≈ 325 min of Premium, 650 min of Standard or 1,300 min of Economy voice-over video
- Studio1,700 credits every month€99/month€0.058 per credit≈ 7 films, 17 TV episodes, or 85 YouTube videos with Premium voice-over≈ 850 min of Premium, 1,700 min of Standard or 3,400 min of Economy voice-over video
A credit costs less than in any pack, and they come every paid month. They never expire. Cancel any time: the plan ends with the month you paid for, and you keep its credits.
New accounts get 40 free credits after confirming their email address.
Credits per minute of video
| SubtitlesTranscript and translated subtitles, with Premium’s translation or Economy’s | Premium 1 credit per minuteEconomy 0.5 credits per minute |
|---|---|
| Voice-over audioVoice-over track and subtitles | Premium 2 credits per minuteStandard 1 credit per minuteEconomy 0.5 credits per minute |
| Voice-over videoVideo with voice-over, audio track and subtitles | Premium 2 credits per minuteStandard 1 credit per minuteEconomy 0.5 credits per minute |
| Burned-in subtitlesAdd-on for voice-over video. Charged once, also when the chosen format needs the picture re-encoded (for example WebM). | +1 credit per minute |
| SDH subtitlesAdd-on for any output: subtitles with sounds, speaker names and songs, for deaf and hard-of-hearing viewers. | +1 credit per minute |
Voice-over is Premium unless you choose Standard or Economy. Subtitles alone cost less in Economy, add-ons cost the same in every grade, and a job’s credits are rounded up to a whole credit.
What one video costs
| YouTube videoabout 10 minutes | from €1.32Episode pack: €5 |
|---|---|
| Anime episodeabout 24 minutes | from €3.17Episode pack: €5 |
| TV episodeabout 50 minutes | from €6.60Long episode pack: €10 |
| Podcast episodeabout 1 hour | from €7.92Long episode pack: €10 |
| Filmabout 2 hours | from €15.84Movie pack: €18 |
Prices are with Premium voice-over, 2 credits a minute; with Standard, 1 credit a minute, every video costs half as much, and with Economy, 0.5 credits a minute, a quarter. “From” is at the cheapest pack’s credit; the pack shown is the smallest that holds one.
AI voice-over or a recording studio?
What a translated voice-over video costs with Vocnu, next to a professional studio voice-over.
| Video length | Vocnu | Studio voice-over | You save |
|---|---|---|---|
| 25 minutes | €3.30 to €5.00 | from €1,125 | about 99% |
| 1 hour | €7.92 to €12.00 | from €2,700 | about 99% |
| 2 hours | €15.84 to €24.00 | from €5,400 | about 99% |
Vocnu: voice-over video with translation and subtitles, depending on the credit pack. Studio: from €45 per finished minute, recording only; translation costs extra. Sources: a Lithuanian studio price list (from €45 per minute) and Translated (USD 50 to 200+ per minute).
The Vocnu column is Premium voice-over. With Standard, a video costs half as much, and with Economy a quarter.
- Minutes are rounded up for each video.
- If a job fails, its credits come back automatically.
- Prices are in euros. EUR and GBP prices include VAT; USD prices add any VAT or sales tax at checkout.
- Orders are sold through Link (a Stripe company), our reseller.
Questions and answers
More answers, step by step, are in the guides.
What's the difference between voice-over and dubbing?
Voice-over keeps the original sound, lowered under the voice, while one clear voice reads the translation, as in TV documentaries. Dubbing replaces every voice and matches the lips. Vocnu does voice-over today.
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.
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.
Which languages are supported?
Voice-over and subtitles in 35 languages, including English, Lithuanian, Spanish, German, French, Polish, Ukrainian, Japanese, Korean, Chinese, Arabic and Hindi. The spoken language of your video is detected automatically.
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.
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.
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.
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.
Can I get a refund?
Yes. You can get a full refund within 14 days of purchase. See the Refund Policy.
How do payments work?
Orders are sold through Link (a Stripe company), our reseller and Merchant of Record. It handles payment, invoices and taxes, and accepts cards, Apple Pay, Google Pay and several local payment methods. Your card statement shows LINK.COM* VOCNU.
Do I need a subscription?
No. Credit packs are one-time purchases. A monthly plan is optional: every month it adds credits, each cheaper than in any pack. Credits from both never expire, and you can cancel a plan any time on the Credits page; it ends with the month you paid for.
What is the difference between Premium, Standard and Economy?
Premium, the default, reads your video with our most natural, expressive voices and our finest translation, for 2 credits a minute of voice-over. Standard reads it with clear voices, a female and a male one in each language, and a good translation by smaller models, which now and then slip in meaning or grammar, for 1 credit a minute. Economy, the lowest price, has a plain synthetic voice read a quick translation, good for following a video, for 0.5 credits a minute; it slips more often and does not read Croatian or Slovenian yet. Subtitles on their own cost 1 credit a minute with Premium’s translation or 0.5 credits with Economy’s; those of a voice-over use its grade’s translation, and the add-ons cost the same in every grade.
Which grade should I choose?
Premium for films, series, anime and anything you share, where the voice and every word matter. Standard for lectures, courses, news, talks and long videos you watch to follow what is said, when fewer credits matter more than the delivery. Economy when the lowest price matters most and following along is enough: a plain voice and a quick translation for a quarter of Premium’s credits. You choose for each video, and your account remembers your last choice in the app and the browser extension alike.
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.
Can I watch a video in my language without uploading it?
Yes, with the Vocnu browser extension for Chrome, Brave and Edge: it voices the videos you watch in your browser and shows subtitles in your language, for 2 credits a minute with Premium voice-over (1 credit when Vocnu reuses a voice-over it already made of the video), 1 credit with Standard or 0.5 credits with Economy, which live mode does not offer. Subtitles only cost 1 credit a minute, or 0.5 credits in Economy.
Try it on your own video
Sign up, get 40 free credits and see the price for your video before you spend anything.
Create free account