How to add an AI voiceover to a video

To add an AI voiceover to a video, upload the video, get a script, pick a voice, and export. With ScreenDub the script part is also handled for you: it watches what happens on screen, writes the narration to match, and voices it in a natural AI voice. You never record audio, and you can ship the same video in 70+ languages. The whole flow takes minutes, and the free plan needs no credit card.

Two ways to get a voiceover, and which one you want

Most AI voiceover tools are text-to-speech: you write the script yourself, paste it in, and a voice reads it. That works, but the writing is the slow part, and syncing the audio to the footage afterward is the fiddly part.

The newer approach starts from the video instead of the text. ScreenDub reads the recording itself, detects each action on screen, and drafts narration that matches what the viewer is seeing. You edit lines in text where the wording is off, and the timing stays tied to the footage. If you already have a script you like, you can still shape the narration to it, but you are never staring at a blank page.

What you need

• A free account. No credit card is needed to start.
• The video as an MP4, WebM, or MOV. A silent screen recording is the ideal source.
• Optionally, notes on tone and terms: how formal to sound, and how product names should be said.

How to add an AI voiceover, step by step

1. Bring the video. Record your screen in the browser, or upload footage you already have. Silent recordings are fine; that is the normal starting point.
2. Let the script draft itself. ScreenDub analyzes the video and writes narration matched to what happens on screen, in the style you pick. A demo can sound persuasive and a tutorial can sound calm and instructional.
3. Edit the lines that need you. The script is editable line by line. Fix wording, lock product names, cut anything obvious. Editing text is the whole trick: no take to re-record, no waveform to slice.
4. Pick the voice. Choose a voice and accent, preview it against the footage, and swap it if the tone does not fit. The narration stays synced to the on-screen action.
5. Export. Render a finished MP4 with the voiceover baked in, plus captions and chapters if you want them. You also get a step-by-step PDF guide from the same recording.

Tips for a voiceover that does not sound robotic

• Write for the ear, not the eye. Short sentences read better aloud. If a line feels long in text, it will feel longer spoken.
• Say what the viewer cannot see. Good narration adds the why. The viewer can see the click; tell them what it accomplishes.
• Preview the voice on real footage. A voice that sounds fine in isolation can fight the pacing of your video. Preview before you render.
• Keep terms consistent. Decide once how features and product names are worded, and hold the script to it.
• Add captions. Plenty of viewers watch muted. Captions plus voiceover covers both audiences from one export.

What it costs

ScreenDub bills by minutes of narration per month, not by seats. The Free plan includes 10 minutes a month, enough for a real demo or a couple of short tutorials. Paid plans start at $14.99 a month for 50 minutes. Traditional alternatives run from hiring voice talent per finished minute to per-seat subscriptions on text-to-speech tools, and both still leave the script writing and the syncing to you.

Frequently asked questions

Add a voiceover to your first video free. Get started, or see how to make a product demo video without recording your voice.