What aspect ratio should TikTok videos use?

9:16 vertical. Set it before generating so the clip fills the phone screen and looks native in the feed.

How long should an AI TikTok clip be?

Each clip can be 5, 8, or 10 seconds. For a longer post, chain several clips together in an editor.

Can I add a trending sound to my AI clip?

Yes. Seedance Mini generates visuals only, so add the sound, music, or captions in TikTok or your editor after exporting.

Is it free to make TikTok clips with AI?

You can test ideas free, and the anonymous tier covers text-to-video at 480p. Register for free daily credits and unlock 1080p, watermark-free exports on paid plans.

How-to · 6 min

How to Make TikTok Videos With AI

If you want to make TikTok videos with AI, the whole game is vertical, fast, and visual. SDMini generates 9:16 clips with Seedance Mini in seconds, which is exactly the format and speed short-form demands. You can produce a week of content in one sitting without filming anything.

This guide lays out a practical workflow: nail the vertical frame, lead with a hook, keep the pacing tight, and assemble a finished post. It also covers how to test ideas cheaply so you only spend effort on the clips that work.

Start vertical: set 9:16 first

TikTok is a vertical feed, so set the aspect ratio to 9:16 before you generate. A vertical clip fills the screen and feels native; a cropped landscape clip looks like a repost. Frame your prompt for a tall shot with the subject centered and large.

Vertical motion reads best on a phone. Push-ins, tilt-ups, and rising camera moves use the tall frame well. Keep the subject simple so it stays clear at thumbnail size and while someone scrolls past quickly.

Lead with a hook in the first second

Short-form lives or dies in the opening moment. Your first frame and first second decide whether someone keeps watching. Generate a clip whose strongest visual lands immediately: motion, a striking subject, or a surprising scene, not a slow fade-in.

Write the prompt so the action is already happening at the start. "A wave crashes over the camera at sunset" hooks faster than "a calm beach slowly comes into view." Front-load the interest, because viewers do not wait.

Build the post: clips, text, and sound

A single 5 to 10 second AI clip can be a whole post, or you can chain a few clips into a short sequence in any editor. Generate each beat separately at 9:16, then cut them together with quick transitions to keep momentum.

Seedance Mini makes visuals only, so add a trending sound or music and any on-screen captions in TikTok or your editor after export. That combination of AI visuals plus a strong audio track is what most viral short clips are built from.

Test cheap, then commit

Use free generations to test concepts at low cost before polishing. Try three or four hooks for the same idea and keep the one with the strongest opening. This is far cheaper than filming and lets you iterate by the dozen.

Once a concept proves out, regenerate it at 1080p as a registered user and export with no watermark on a paid plan. A clean, watermark-free vertical clip is ready to post directly to your account.

SDMini

Frequently asked questions

What aspect ratio should TikTok videos use?: 9:16 vertical. Set it before generating so the clip fills the phone screen and looks native in the feed.
How long should an AI TikTok clip be?: Each clip can be 5, 8, or 10 seconds. For a longer post, chain several clips together in an editor.
Can I add a trending sound to my AI clip?: Yes. Seedance Mini generates visuals only, so add the sound, music, or captions in TikTok or your editor after exporting.
Is it free to make TikTok clips with AI?: You can test ideas free, and the anonymous tier covers text-to-video at 480p. Register for free daily credits and unlock 1080p, watermark-free exports on paid plans.