AI Reel Generator
Vertical videos with a hook, a voice and captions you can read.
Make 9:16 videos for Instagram Reels, TikTok and YouTube Shorts: a hook in the first two seconds, AI voiceover, music and word-by-word captions.
Examples
AI reel generator scenes
Stills from four scenes of one reel. In the video, captions appear word by word over each scene. Made with OpenPromo’s templates for Crumb & Co, a fictional bakery.
Story / reel · 9:16 · 1080×1920 
Story / reel · 9:16 · 1080×1920 
Story / reel · 9:16 · 1080×1920 
Story / reel · 9:16 · 1080×1920
How it works
How the AI reel generator works
- 1
One idea per reel
Pick an idea or write a brief. The writer plans a hook, a few scenes and a call to action.
- 2
Scenes, narration and timing
Each scene gets a layout, on-screen text and a line of narration. Timing follows the voice.
- 3
Checks before rendering
A missing hook or call to action, voiceover pace, reading time and invented figures are flagged.
- 4
Render the reel
You get an MP4, a poster thumbnail and an SRT caption file.
What you can do
AI reel generator features
Hook in two seconds
The first scene is written to stop the scroll, and the check warns when it is missing.
AI voiceover and music
A natural voice reads the script over a music bed. Turn either off.
Word-by-word captions
Captions follow the voice word by word, and an SRT file comes with every render.
YouTube Shorts maker too
The same 9:16 file works for Reels, TikTok and Shorts.
Poster thumbnail
A poster frame is made for each reel, so the cover in the grid looks right.
Optional B-roll
AI pictures and short clips can fill scenes when your own pictures do not fit.
What it costs
AI reel generator cost
OpenPromo charges nothing. AI calls are billed to your own YepAPI key at YepAPI’s prices, shown here at the time of writing. Settings and usage lists every call with its cost.
| Action | Price | |
|---|---|---|
| Write a reelScenes, text and narration | Scenes, text and narration | $0.02 – $0.08 |
| VoiceoverPer scene | Per scene | about $0.01 |
| Music bedPer reel | Per reel | $0.08 |
| AI pictureOnly if used | Only if used | $0.04 – $0.20 each |
| AI video clipOnly if used, per second | Only if used, per second | about $0.11 |
| Typical 30-second reelVoice and music, no AI clips | Voice and music, no AI clips | $0.15 – $0.50 |
Generated pieces are kept. After an edit, rendering again only pays for what is new.
OpenPromo is an early project in active development. Parts of what this page describes may change.
Your AI key
Start with $5 of free AI credit
The AI work in OpenPromo (reading your site, writing, voices, music and AI pictures) runs on your own YepAPI key. Sign up at YepAPI and get $5 in free credit, for a limited time. That is enough to try every tool.
- 1
Sign up at YepAPI
New accounts get $5 in free credit, for a limited time.
- 2
Copy your API key
It is on your YepAPI dashboard once you sign in.
- 3
Paste it into OpenPromo
In Settings. Set a monthly spending limit there too.
The free credit is YepAPI’s limited-time offer and may end. After it, you pay YepAPI per use at its price. OpenPromo logs every call with its cost, and a monthly limit caps what you spend. See pricing
AI Reel Generator FAQ
Is this an AI TikTok video generator?
Yes. Reels are 9:16 MP4 files, which TikTok, Instagram Reels and YouTube Shorts all accept.
How long can a reel be?
Reels are short: usually 15 to 40 seconds. For longer videos, use a promo video or a tutorial.
Is there a watermark?
No. OpenPromo adds no watermark, hosted or self-hosted.
Are AI avatars included?
No. OpenPromo makes scene-based videos with text, pictures, voice and music, not talking avatars.