AI shorts generator: make YouTube Shorts and Reels with AI
Updated October 2026
Summary
An AI shorts generator turns a topic or script into a finished vertical short — no camera, no editing timeline.
The output is 9:16 with voiceover and burned-in captions, ready for YouTube Shorts and Instagram Reels.
Run it as a series on a schedule rather than making one-offs.
Review each video before it posts until the format is proven.
A short video costs 2 credits up to 30 seconds; the estimate shown before Generate is what gets charged.
An AI shorts generator takes a topic or script and returns a finished vertical short: narration, visuals, and captions in one 9:16 file. You film nothing and edit nothing.
This guide covers what these generators produce, the format that works for Shorts and Reels, and how to run one on a schedule.
What an AI shorts generator produces
The input is a topic or a script. The output is a vertical (9:16) video with a synthetic voiceover and captions burned into the frame, sized for YouTube Shorts and Instagram Reels.
Because the format is fixed, the same finished short can go to more than one platform without re-editing.
The format that works for Shorts and Reels
Short-form is decided in the first seconds and often watched with the sound off. Plan the first line as the hook, keep one idea per short, and keep captions readable on a phone.
A vertical short also has to stand alone: a viewer who never sees another video from you should still get the point.
Run it as a series, not one-offs
One video tests an idea; a series builds a channel. Pick a style and a recurring schedule, and let the generator produce a video per slot until you pause.
A consistent look and voice make new viewers recognize your videos before they read the title.
Review before it posts
Approve-before-post should be the default: every video waits for your decision, and rejected videos post nothing at all.
Once a format is proven, series can opt into auto-approve to remove the manual step.
What a short costs
In Reeloop every video is real AI video: 2 credits up to 30 seconds, 4 credits up to 60 seconds. The estimate shown before Generate is exactly what gets charged, and failed renders refund in full.
Signup grants 10 free credits with no card required, enough for five short videos.
Questions, answered
Can an AI shorts generator make YouTube Shorts and Reels from the same video?
Yes. Both formats are vertical 9:16. Reeloop renders one vertical file with voiceover and captions that fits YouTube Shorts and Instagram Reels without re-editing.
Do I need to write my own script?
No. You can give a topic and let the generator write the script and voiceover, or provide your own script. Either way you review the finished video before it posts.
How long should an AI-generated short be?
Reeloop prices a video up to 30 seconds at 2 credits and up to 60 seconds at 4 credits, so you can match the length to the idea and the platform.
Put it into practice
10 free credits on signup · no card required