How to Create 9:16, 1:1 and 16:9 Variants From One Video

Always start with a 9:16 vertical master, whether it's an AI-generated avatar video or filmed B-roll, and derive the other two ratios from it afterward. Starting with a horizontal 16:9 video and trying to crop it up into a tall vertical frame almost always cuts off the subject or forces an unusable zoom, because horizontal footage was never composed with a tall frame in mind.

This ordering matters because reframing down (cropping a wide shot into a narrower one) discards pixels you don't need, while reframing up (stretching a narrow shot into a wider one) has no extra pixels to draw on and either stretches distorted or adds blurred padding on the sides. A 9:16 master gives you the most usable pixels to crop from for both 1:1 and 16:9 derivatives.

If you're filming B-roll specifically to intercut into the master, shoot it vertical or square from the start rather than landscape, for the same reason — vertical and square source footage crop cleanly down into the 9:16 timeline, while landscape B-roll forces you to either crop in tight and lose context or add letterboxing that looks out of place next to vertical avatar shots.

When composing or reviewing your 9:16 master, keep the avatar's face and any on-screen product centered in the middle 55 to 60% of the frame horizontally. This central zone is what survives when you later crop the video down to 1:1, so anything important sitting near the left or right edge of the 9:16 frame will be cut off entirely in the square version.

This is easiest to plan before generation rather than fix afterward. When setting up an AI avatar shot, most avatars are naturally centered by default, but if you're compositing B-roll or text overlays near the edges of the frame — a logo in the corner, a caption pinned to one side — check that none of it falls outside the zone that will survive a 1:16:9-to-1:1 crop.

Think of the 9:16 frame as three vertical bands: a left sixth, a center two-thirds, and a right sixth. Anything in the outer two bands is fine for the vertical version but will disappear the moment you crop to square, so reserve those edges for background texture and negative space rather than anything the viewer needs to see clearly.

Crop the 9:16 master to 1:1 by trimming equal amounts from the top and bottom of the frame rather than squeezing or stretching the whole image into a square. Center-cropping preserves the original resolution and proportions of everything inside the safe zone from step two; stretching distorts faces and products in ways viewers notice immediately.

Watch the crop specifically during any moment the avatar gestures or the camera pans, since a gesture that reads naturally in the taller 9:16 frame can end up with a hand or arm cut off mid-motion once you've trimmed the top and bottom. Scrub through the cropped version at normal speed, not just checking a static first frame, to catch these mid-motion crop issues.

Recheck caption placement after cropping, since captions positioned safely within the 9:16 frame's safe zones don't automatically stay clear of the 1:1 frame's different proportions. A caption sitting comfortably above TikTok's UI in the vertical version can end up too close to the bottom edge once the frame's overall height has shrunk in the square crop.

For 16:9, either add blurred or brand-colored padding to the sides of a centered 9:16 crop, or reframe to a wider shot if you have B-roll or a wider avatar composition available. Aggressively cropping a vertical video down to landscape usually loses too much of the frame to remain usable, since you'd be keeping only the narrow center strip of an already-narrow original.

Padding with a subtly blurred, zoomed-in version of the same footage behind the centered subject looks noticeably more polished than a flat color bar, and it's the default treatment most video editors and Klip Kanvas's export tool apply automatically. Brand-colored padding works too, particularly if it reinforces a consistent look across your ad account, but avoid plain black bars, which read as an unfinished export rather than an intentional design choice.

16:9 placements — YouTube pre-roll, some Meta feed slots, connected TV — also tend to be watched for longer stretches and sometimes with sound on, unlike the sound-off scroll behavior typical of 9:16 placements. It's worth reviewing whether your caption pacing and hook timing, tuned for a three-second vertical scroll-stop, still make sense for a landscape placement where the viewer is more likely to already be paying attention.

Open each of the three exported files and confirm captions, logos and CTAs sit clear of platform UI overlays specific to that ratio and placement — TikTok's bottom and right UI for 9:16, Feed's caption-and-button overlay for 1:1, and YouTube's skip button and progress bar for 16:9. A safe zone check that only covers the vertical master misses problems unique to the other two ratios.

Do this check inside the actual platform app or the platform's official ad preview tool rather than trusting an editing timeline's raw export view, since editing software rarely simulates the exact UI a live placement will overlay on top of your video. A five-minute check here catches placement issues that are otherwise invisible until the ad is already live and underperforming for reasons that look like a targeting problem but are really a cropping problem.