Free AI YouTube Shorts Generator

An AI YouTube Shorts generator turns a script, idea, product image, or existing long-form video into a finished 9:16 vertical Short — automatically handling the writing, visuals, voiceover, and captions. Instead of filming and editing by hand, you describe what you want and the AI produces a ready-to-post Short in minutes. Soku AI goes further by connecting Shorts generation to ad deployment and conversion tracking across Meta, Google, and TikTok.

Yes. Soku AI offers a free plan that lets you generate YouTube Shorts and launch them as ads — no credit card required to get started. Premium plans unlock higher generation volumes, additional formats, and advanced performance analytics.

With Soku AI it takes 3 steps: (1) describe your Short or drop in a product image, product page, or long video to repurpose, (2) generate a 9:16 vertical Short with AI voiceover and auto-captions sized for the Shorts shelf, (3) post it and deploy the best variants as ads while Soku tracks which version converts. The whole process takes minutes.

YouTube Shorts use a 9:16 vertical aspect ratio, ideally 1080x1920 pixels. To qualify for the Shorts shelf, a video must be vertical and 3 minutes or shorter (180 seconds). Soku AI outputs Shorts sized to these specs by default, so they fit the feed without cropping.

Up to 3 minutes (180 seconds). YouTube raised the limit from 60 seconds in late 2024. There is no minimum length, but most high-performing Shorts are short and hook-first because retention in the first second drives reach.

Yes. Soku AI can repurpose a long-form video into multiple hook-first vertical clips, add captions, and size them for the Shorts shelf — so a single webinar, podcast, or long YouTube video becomes a stream of short-form content. It's one of the fastest ways to feed the Shorts algorithm consistently.

For marketing teams, the best generator connects creation to performance. Soku AI stands out because it generates short-form vertical video and then deploys and tracks it as ads — so you can see exactly which Short, hook, and format drives the best ROAS. Other popular tools include Revid AI (rapid social clips), HeyGen (AI avatars and 175+ languages), and InVideo AI (prompt-based templates), but they focus on creation only.

Yes. Most short-form video is watched on mute, so burned-in captions are essential for keeping viewers from scrolling past. Soku AI adds auto-captions to every Short by default and pairs them with AI voiceover so your Shorts work both with and without sound.