Video dubbing here means one upload, one language choice, one result — the same video with a new voice track in the language you picked. The voice is cloned from the speaker, so the dubbed version sounds like the same person speaking another language. You also get the translated text and an SRT file.
[ What you get ]
Translate and voice over any video
AI video dubbing replaces the spoken audio of a video with a new voice track in another language and leaves the picture untouched. It is not subtitling and not a text translation: the output is audio, with the pacing of the original. Traditional dubbing needs a translator, a voice actor and a sound engineer; here it is one upload and a few minutes.
What comes out:
The dubbed video.
Same picture, same length, new voice track. Compare Original and Dubbed in the player, then download.
The new audio track on its own.
For editors who mix it themselves.
The translated text and an SRT file.
The words of the new track with timings, for captions or for checking the translation before you publish.
Several speakers each get their own cloned voice and stay distinct; background music and sound effects stay where they were. Two honest limits: text burned into the picture stays in its original language, and lip movement is not adjusted.
[ How to use it ]
AI voice translator for videos: three steps
Add the video
Paste a YouTube link or upload an MP4, MOV or WebM file. For a file, its length shows before anything starts.
Choose the language
Pick the language you want to hear. The source language is detected automatically. Confirm you have the right to use the video.
Dub, compare, download
Dubbing takes a few minutes, and a share link lets you close the tab and come back. Switch between the original and the dubbed track, then download the video, the audio or the text.
Dubbing runs on the audio, not on captions, so it works on videos with no subtitles at all. The most common directions are Spanish to English, Hindi to English and English to French; any supported pair works.
[ Limits ]
Free version limits
Your first dub is free, no sign-up. Leave your email for one more, then create a free account and pay only for what you use. Free dubs carry a small watermark. Re-opening a result you already have does not count.
Free dubbing is sized for short videos: the length and file-size caps are shown next to the upload area, and each dub covers one language. Your dubbed video stays at its own link for a while, so download what you want to keep.
[ Why marketers use it ]
Voiceover generator that keeps your voice — and opens ads in languages you don't speak
Creators dub to publish one video in several languages. Marketers use the same voiceover generator in reverse. A video ad made for Mexico, Brazil or India tells you nothing if you do not speak the language; dubbed into yours, it tells you everything in the length of the clip: the hook, the offer, the objection it closes, with the delivery and the tone intact. A text translation gives you the words and loses the tone, and the tone is usually the part that explains why the ad works.
The catch is scale: knowing what works in a market means the ads that have been running there for months, for every brand in the niche, and uploading those one by one is a week of work.
In Spytrend that step disappears: video ads from Facebook and TikTok are already collected, and on paid plans any of them can be voiced over in your language in one click. You pick the market and the category, and the ads speak your language.
[ Go further with Spytrend ]
Every video ad in any market, voiced in your language
Spytrend is an ad intelligence platform for Facebook and TikTok advertising: a full five-year archive of ads, AI-classified into 33 business categories, with every advertiser assembled into a single card — all ads, pages, domains and countries in one place. On paid plans, any video ad in it can be voiced over in another language in one click.
Two jobs where the language barrier is the whole problem
- Showing a winning ad to the people who sign off the budget. A client or a team lead who doesn't speak Portuguese won't approve a Brazilian creative from a transcript. Voiced in their language, the ad plays the way it plays in its market — the pace, the tone, the moment the offer lands — and the decision takes one viewing.
- Checking whether a hook survives the language change. Some openings work because of a pun, a local reference or a rhythm that only exists in the original. Hear the dubbed version before you brief a shoot: if the hook falls flat in your language, it will fall flat for your audience too, and you have saved a production day.
What the voice-over is attached to
On this page the dubbed video stands alone. In Spytrend it sits inside the ad card, so every voiced ad comes with its launch date, its days running and the countries it runs in. One level up is the whole advertiser: all ads, pages, domains and countries in one card, with an ad-spend estimate.
A market read in three steps
Pick the country and the category
Choose a country and one of 33 business categories, or type a brand or a domain. You get the video ads running in that market.
Voice over the longest-running ads
Sort by run time, open the top ads, press translate and voice over. An ad that has run for months is one that pays for itself, so those are the hooks worth hearing.
Carry the angle across borders
Compare a brand's ads country by country. The angle that runs everywhere is the one to adapt; the one running in a single market is a local test.
Why the market, not the video
One dubbed video tells you what one advertiser said once. A market read needs the ads that stopped as well as the ones running now, with their run time and their spread across countries. A free ad library gives none of that; Spytrend keeps five years of ads, adds 10 million new ones a day and records how long each one ran.
How to start
A free Spytrend account opens the ad library; paid plans add fresh ads and every filter. Search a brand from a market whose language you don't speak and see which of its video ads have run longest.