From Script to Screen: Which AI Video Generator Actually Makes Vertical Videos for TikTok and Instagram?

If you have ever tried pasting a script into a standard AI video generator, you already know the frustration: you get back a stunning, cinematic landscape video (16:9) that leaves massive black bars at the top and bottom of TikTok, Instagram Reels, or YouTube Shorts.

Creating vertical (9:16) short-form content directly from a written script requires tools built specifically for social media feeds. Fortunately, several platforms can take your text, add matching visuals or AI avatars, synthesize voiceovers, and output vertical videos ready to post.

The right choice depends entirely on the type of video you want to make.

1. Best for Faceless Explainer & Marketing Videos: InVideo AI

If your script is a breakdown, a tutorial, a listicle, or a marketing pitch and you want an automated “faceless” video, InVideo AI is one of the fastest options on the market.

• How it works: You paste your script or type a prompt describing your topic. The AI analyzes the text, writes a voiceover script, selects stock footage or generates clips, adds dynamic captions, and assembles a vertical (9:16) draft.
• Why it shines: You can edit the video simply by chatting with the text editor (