AI YouTube Shorts ad generator
YouTube Shorts is a sound-on, fast-scrolling feed where the first couple of seconds decide everything. Upload a product photo and a short brief, and Sepia builds a series of vertical UGC ads, each opening on a different hook, with burned-in captions and mixed sound. No filming, no casting, ready to post in about 24 hours.
Built for the Shorts feed
Every ad is born vertical 9:16, in the loose, creator-shot style that feels at home between organic Shorts. Captions are burned in, sound and music are mixed for sound-on viewing, and safe zones leave room for the Shorts UI so nothing important sits under a button or the title.
Many hooks, one product photo
Sepia returns a series of ads from a single photo and brief, each opening on a different hook. That lets you test plenty of openings cheaply on Shorts, both as paid campaigns and organic posts, and keep the ones the feed actually rewards.
From photo to post in about 24 hours
The whole pipeline runs end to end: script, AI voiceover, AI scenes, and editing. You get finished Shorts ads in about 24 hours, on pay-as-you-go credits with no subscription and no minimum, so you can keep feeding the feed without booking a shoot.
Frequently asked questions
Are the videos ready to post as YouTube Shorts?
Yes. They export as vertical 9:16 with burned-in captions, mixed sound and safe zones respected, so they drop straight into YouTube Shorts, and into Reels or TikTok too, without extra editing.
Why get a series of ads instead of just one?
On Shorts the hook in the first couple of seconds makes or breaks a video. Each ad opens on a different hook, so you can test many openings cheaply and double down on the ones that hold attention in the feed.
Do I need to film anything or hire a creator?
No. You upload a product photo and a short brief, and Sepia handles the script, AI voiceover, AI scenes and editing. No filming, no casting, and you only pay for the credits you use.