AI video dubbing
Upload a video and SaydiVoice detects the dialogue, splits it into sentences, translates it if needed and re-records it with a natural AI voice that matches each line's length — so the picture and the audio stay in sync.
What you get with AI dubbing
What is AI video dubbing?
AI video dubbing replaces the spoken voice in a video with a different voice, while keeping the picture, music and sound effects intact. The traditional route needs a microphone, a voice actor and a lot of editing time; an AI dubbing tool transcribes the dialogue, translates it when you need another language and re-voices each line so it lands in the same place as the original.
Pick a voice to turn your text into speech
70 English AI voices to preview for free before you generate. Each has its own page with a sample line and accent details.
How to dub a video
- Upload your video to the dubbing studio.
- Check the detected transcript, correct anything that is wrong and choose the voice.
- Generate and download the dubbed video.
What does AI dubbing actually change in a video?
It replaces only the spoken dialogue. The dubbing pipeline separates the voice track from the music and sound effects, transcribes the speech into sentence-level cues, translates each cue when a different language is needed, and then re-voices it with a synthetic voice. The picture, the background music and the sound effects are left as they were, so the video keeps its original feel while the language changes.
How does AI dubbing keep audio and picture in sync?
Each translated line is fitted to the length of the segment it replaces. Because the transcript is cut at sentence boundaries rather than at fixed intervals, the engine knows exactly how much time every line has, and it stretches or compresses the synthesised speech to land inside that window instead of letting the audio drift away from the lip movement as the clip goes on.
When should you dub a video instead of adding subtitles?
Dub when the audience should hear the content in their own language: advertising, explainers, course material, product demos and short-form social video all perform better when the viewer does not have to read. Subtitles suit situations where the original voice matters, such as interviews or content where the speaker's own delivery is part of the value. SaydiVoice handles both, and can also turn a subtitle file into a spoken track.
AI dubbing questions
Is AI video dubbing free on SaydiVoice?
Yes to start with. The free plan includes 5 minutes of dubbing per month, which is enough to test the workflow on a short clip. Paid plans raise the limit to 20, 30 or 150 minutes a month.
Does the dubbed audio stay in sync with the video?
The pipeline splits the transcript into sentence-level cues and stretches or compresses each translated line to fit the original segment, which keeps the audio aligned with the picture rather than drifting across the clip.
Can I keep the original music and sound effects?
Yes. The voice is separated from the rest of the audio track, so the background music and effects are preserved and only the dialogue is re-voiced.
Which languages can I dub into?
You can translate and dub into the languages SaydiVoice supports for speech generation — 29 of them today, including English, Vietnamese, Spanish, Portuguese, French, German, Japanese, Korean and Chinese.
Do I need a paid plan to download the result?
No. You can render and download the dubbed video on the free plan within the monthly dubbing minutes. Downloads are available as MP4, and you can also export just the audio.
What is the difference between dubbing and subtitles?
Dubbing replaces the spoken audio with a new voice; subtitles leave the original audio untouched and add readable text on screen. SaydiVoice can produce subtitles too, and can turn a subtitle file into speech.