How to add a voiceover to an AI video
There is no separate voice tool. Choose Voiceover when you set up your video, write up to 50 words, pick a voice, and the voice and the picture are made together.
No subscription · Credits never expire · From $9
- Up to 20 secondsone continuous clip
- Built-in voiceoverup to 20 s, 50 words
- Talking photolip-sync, 4 or 8 s
- Full HD or 4Kenhanced automatically
BetterVideo at a glance
BetterVideo (bettervideo.io) is an AI video platform. It makes short videos from a sentence (text to video) or a photo (image to video), adds built-in music or a voiceover, and delivers them in Full HD 1080p or 4K Ultra HD. It also enhances and upscales videos made in other tools. Credits are sold in packs from $9, never expire, and there is no subscription.
- Maximum clip length
- 20 seconds, for both text to video and image to video
- Built-in voiceover
- Up to 50 words, up to 20 seconds, with a male or female voice
- Lip-sync (Talking photo)
- 4 or 8 seconds, about 20 words, from a photo with a clear face
- Music
- 10 AI-generated styles; one sound (music or voiceover) per video
- Resolution
- Full HD 1080p or 4K Ultra HD, enhanced from a 720p original
- Shapes
- Vertical 9:16 or horizontal 16:9
- Enhancement
- Included in every Create video; a separate enhancer upgrades any video up to 5 minutes
- Pricing
- Credit packs from $9, no subscription, credits never expire
Facts checked 2026-10-01.
How it works
Write your script in the box. The length of the video follows your words, at about two and a half words a second, so the voice always fits the picture.
Writing a script that sounds good
- Short sentences read more clearly
- Spell out how numbers and names should be said
- Read it aloud once and cut anything that makes you run out of breath
Voiceover or music?
You choose one sound for each video. A voiceover video carries the voice only; a music video carries music only.
Face speaking instead?
To make the face in a photo speak, use Talking photo. It is 4 or 8 seconds long, with a script of up to about 20 words.
Common script problems
- Too long: more than 50 words cannot be made in one video
- Too many numbers or brand names, which read awkwardly aloud
- Sentences that run on with no pause, which make the voice rush
- Claims you cannot support, so keep the script accurate
Already have a video, even one made in another tool?
Sharpen it and upscale it to Full HD or 4K with the same credits. See how to upscale an AI video to 4K → or enhance a video now →
Frequently Asked Questions
Up to 50 words, for a video of up to 20 seconds.
A male voice and a female voice.
Not inside BetterVideo. You choose a male or female AI voice.
Keep reading
- With VoiceoverWrite a script, pick a male or female voice and get a finished AI video with the voiceover already in it. Up to 20 seconds, Full HD or 4K.
- Voiceover scriptFit your message into 20 seconds: how many words it takes, a simple structure and three example scripts.
- Photo Video With VoiceoverAdd a voiceover to a photo video: write up to 50 words, choose a male or female voice and get a finished clip up to 20 seconds.
- AI video guidesPlain-English guides: how to write a prompt, add a voiceover, choose Full HD or 4K, make vertical video and more. Up to 20 seconds, no subscription.
- Text to VideoType a sentence and get a finished video with music or a voiceover, up to 20 seconds, in Full HD or 4K. Pay as you go. Credits never expire.
- Image to VideoTurn a photo into a moving video ad, or make the face in a photo speak. Music or voiceover, Full HD or 4K, up to 20 seconds. No subscription.
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