---
title: "Free AI Video Maker: Videos, Ads and Audio to Video"
description: "Create videos with AI from a topic: script, voice, subtitles, scenes and music in minutes. Quick video ads, Reels, TikTok and Shorts, or turn audio into video. Free, in your browser."
url: "https://www.utillab.net/audio/video"
language: "en"
---

# AI Video Maker

Create a video from a topic in minutes: the AI writes the script, voices it with subtitles and builds the scenes. Great for quick ads, Reels, TikTok, Shorts and YouTube.

i Write the topic: the AI writes the script, the voice reads it with subtitles and the AI director builds the scenes. Then change anything in the chat.

Guide

## Videos with subtitles that people watch to the end

### Step by step

1. Write the topic in Create with AI (or generate the audio from your own text): the AI writes the script, voices it with subtitles and builds the scenes.
1. Choose the format: vertical for Reels, TikTok and Shorts, square for the feed, horizontal for YouTube.
1. Pick the background or a photo (and how much to darken it), the words per caption, the position and the caption style: one of 8 templates, or your own font, colours, outline and shadow.
1. Click Make video and download the MP4.

### Tips

- **Few words at a time**: 3 to 6 words per subtitle are easy to read on a phone.
- **Keep clear of the app buttons**: on Reels and TikTok, the bottom and the right side are covered by buttons and the caption; the Bottom position already keeps clear of them.
- **Highlight the spoken word**: it holds attention and helps those watching without sound.

## Frequently asked questions

### How do I create a video with AI?

In Create with AI, write the topic (for example, "ad for my pizzeria with 20% off"). The AI writes the script, the voice reads it with synced subtitles and the director builds the scenes. Then adjust anything in the chat or the tabs and click Make video to download the MP4.

### Which format should I use for Reels, TikTok and Shorts?

Vertical 9:16 (1080×1920). Square 1:1 works best in the Instagram and Facebook feed, and horizontal 16:9 on YouTube and in presentations.

### Can I make a quick video ad?

Yes. Describe the product, the offer and who it is for in Create with AI: in seconds you get a vertical video with script, voice, subtitles, scenes and music, ready for Reels, TikTok, Shorts or Instagram ads. Ask for changes in the chat, like "bigger price in scene 2".

### Is my audio uploaded anywhere?

No. The video is made in your browser with WebCodecs; the audio, the photo and the subtitles never reach our server.

### Which browsers can make the video?

Up-to-date Chrome, Edge and Firefox on computers and Android, and recent Safari. Older browsers show a message instead.

### Can I change the font and the look of the captions?

Yes. Pick one of 8 ready-made templates (Classic, Impact, Box, Karaoke, Comic, Elegant, Marker and Minimal) or set it up yourself: font, size, text and highlight colours, outline, caption shadow, a band behind the text and capital letters. With a photo as the background you also choose how much to darken it.

### What does the AI director do?

It reads the narration and builds scenes over it: titles, lists, big numbers that count up, charts, maps, rankings, quotes, icons, emojis and photos from free image banks, with animated backgrounds and transitions. Then you chat to change anything ("bigger yellow subtitles", "a chart in scene 3", "photos of Paris") and watch the preview update. Quick changes work without an account; the AI needs a free account.

### Can I use the music, sounds and photos in my videos?

The background music, the sound effects and the visualizer are generated in your browser, so they are free to use with no copyright claims. Photos come from Wikimedia Commons, Openverse or Pexels under open licences: the author’s credit is written in the corner of the video, as those licences ask.

Last updated: November 12, 2026