TL;DR
You need four shapes for almost every paid social plan in 2026: 9:16 for Reels, Stories, TikTok and Shorts, 4:5 for the Meta feed, 1:1 for LinkedIn and anywhere you're unsure, and 16:9 for YouTube. The fast way to get them is not to crop one master video four times, it's to recompose: same message, same brand, laid out again for each shape so the text and product stay inside each platform's safe zone. Auto reframe tools are fine for footage. For motion graphics and text-heavy ads, recomposition wins. Then test three hooks across those formats, not one hook across ten.
Which ad formats do you need for each platform?
This is the cheat sheet. Pixel sizes are the common recommendations, and the safe zones are where each app's buttons, captions and profile names sit on top of your ad. Keep your headline, product and logo out of those areas.
| Placement | Ratio | Size (px) | Keep clear | Good length |
|---|---|---|---|---|
| Instagram and Facebook Reels, Stories | 9:16 | 1080 × 1920 | Top ~14%, bottom ~20 to 25%, right edge | 6 to 15 seconds |
| Instagram and Facebook feed | 4:5 | 1080 × 1350 | Bottom ~14% | 6 to 15 seconds |
| TikTok in-feed | 9:16 | 1080 × 1920 | Top ~10%, bottom ~20%, right ~15% | 9 to 15 seconds |
| YouTube Shorts | 9:16 | 1080 × 1920 | Bottom ~25%, right ~15% | 15 to 30 seconds |
| YouTube in-stream | 16:9 | 1920 × 1080 | Bottom ~10%, top-left corner | 6 to 15 seconds |
| LinkedIn sponsored video | 1:1 (vertical and 16:9 also work) | 1080 × 1080 | ~50px from every edge | 15 to 30 seconds |
Platforms move these numbers around every year or so, and they're common recommendations rather than official quotes, so check each ad manager's preview before you launch. The pattern holds, though: vertical apps cover the top and bottom of your frame, and the right edge is where the like and share buttons live.
Should you crop or recompose your ad for each format?
Cropping takes a finished video and cuts a new frame out of it. Go from 16:9 to 9:16 and you keep about a third of the width. That works when there's one subject in the middle, like a person talking. It breaks when your ad has a headline across the full width, a product shot on one side and a logo in the corner, which describes most motion ads.
Recomposing keeps the same pieces and lays them out again for the new shape. The headline wraps onto two lines, the product moves above the text instead of beside it, the logo moves out of the safe zone. Nothing gets cut off, because nothing was cropped.
Smart reframe tools, like Auto Reframe in Premiere, or Luma's reframe tool, sit in between. They follow the subject and move the crop around, which is great for live-action footage. But they're still cropping, so text that ran across a wide frame gets cut either way.
What's the fastest way to make ad variants in every format?
| Method | Crop or recompose | Time for 4 formats | Cost | Best for |
|---|---|---|---|---|
| Re-edit by hand (After Effects, Premiere) | Recompose, manually | Hours per ad | Premiere from US$22.99/month (annual plan, billed monthly), plus an editor's time | Hero campaigns with a dedicated designer |
| Auto reframe (Premiere, CapCut, Luma) | Smart crop | Minutes | Part of the editor's plan; check which tier includes it | Live-action footage, UGC, talking heads |
| Template resize (Canva Magic Resize) | Re-layout of template elements, then tidy by hand | 15 to 30 minutes | Canva Pro, US$144/year | Simple template ads, light animation |
| Prompt-based motion (fluos) | Recompose, by asking | Minutes per format | First video free with 300 welcome credits (watermarked); paid plans from US$19/month | Motion graphics and text-led ads |
Times are rough estimates for four formats of one ad. Competitor prices were checked on vendor sites on October 5, 2026 and change often: Adobe, CapCut, Luma, Canva and Fluos. Taxes and usage limits may apply.
Being honest about the trade-offs: if your ads are mostly footage of people, auto reframe in the editor you already use is the right answer and usually costs nothing extra. Canva is quick when your ad is basically an animated static. Recomposition matters most when the ad is type, product shots and motion, which is exactly the kind that breaks when you crop it.
How do you turn one ad into every format, step by step?
Design for the tallest frame first.
Start in 9:16. It's where most of your impressions will come from, and it's the hardest shape. Stacking a layout top to bottom is easy to widen later, squeezing a wide one is not.Keep the message in the middle.
Put the hook, the product and the call to action in the center band of the frame, away from the safe-zone edges in the table above. If it reads in the center of 9:16, it'll read everywhere.Make each format on purpose.
In a prompt-based tool like fluos, the ad is built as a layout, not a flat video, so you can ask for "a 4:5 version for the feed" or "a 16:9 version for YouTube, product on the left, headline on the right" and it's laid out again rather than cropped. Across the first 500 videos made on fluos, the average render finished in about three minutes, so a full set of formats fits in one sitting. That historical render average is not a promise for an individual build. Export each cut once it looks right before you ask for the next shape, and version history keeps the master safe (more in the multi-format guide). Landscape, portrait and square compositions can export in 4K when the composition size scales evenly to it (1080 × 1920 to 2160 × 3840, for example); a 4:5 version exports at its composition size.Check every version on a phone.
Preview each one in the ad manager or on your own phone. You're looking for one thing: is anything important under a button, a caption or a profile name?Name the files so you can read the results.
Something like "hook2_9x16_v1.mp4". Future you, reading a results table at 11pm, will be grateful.
How do you test 3 hooks across 3 formats?
Format matters, but the hook matters more. The first one to two seconds decide most of an ad's result, so the best use of fast variants isn't twenty sizes of one idea, it's a few different openings in the sizes you actually buy.
A simple grid that works for small teams: write three hooks for the same ad, a problem hook (“still chasing unpaid invoices?”), an outcome hook (“get paid 9 days faster”), and a proof hook (a number, a logo wall, a quote). Keep the middle and the end of the ad identical. Then make each hook in 9:16, 4:5 and 1:1. That's nine files from one ad.
If the hook is a template variable in your fluos composition, you can swap the hook text at export and download up to six variants in one batch, so the three hooks for one format come out together.
Launch them so each format runs in its own placement, and read the results by hook first. If the outcome hook wins in all three formats, you've learned something about your message, not just about a ratio. Kill the weakest hook after a week and write a new one to replace it. That's the loop.
What are the most common ad variant mistakes?
Letterboxing. Dropping a 16:9 video into a 9:16 frame with black or blurred bars. It screams “repurposed”, and most of the screen does nothing.
Text in the danger zone. The call to action sitting exactly where TikTok puts its caption. Check the safe zones every time.
Testing formats instead of ideas. Nine sizes of one weak hook will lose to one size of a strong one.
Tiny type. Text that's fine in a 16:9 export becomes unreadable once a feed scales it down. Go bigger than feels right. For more on what to put in the ad itself, see our guide to prompting scroll-stopping social ad motion.
Frequently asked questions
- What aspect ratio should video ads be in 2026?
- 9:16 (1080 × 1920) for Reels, Stories, TikTok and YouTube Shorts, 4:5 (1080 × 1350) for the Instagram and Facebook feed, 1:1 (1080 × 1080) for LinkedIn and as a safe default, and 16:9 (1920 × 1080) for YouTube in-stream.
- How do I resize a video ad for every platform?
- For footage of people, use an auto reframe tool in your editor. For motion graphics and text-heavy ads, recompose instead of cropping: lay the same elements out again for each ratio, keeping the message out of each platform's safe zones.
- What's the difference between cropping and recomposing a video?
- Cropping cuts a smaller frame out of the original, so anything outside it is lost. Recomposing rebuilds the layout for the new shape, so the headline, product and logo all stay on screen.
- How many ad variants should I test?
- For a small budget, three hooks in three formats, nine files, is plenty. Change the opening, keep the rest the same, and judge by hook first.
- What AI tool makes vertical, square and landscape ad variants?
- Auto reframe in Premiere, CapCut or Luma works well for live-action footage. Canva's Magic Resize handles simple template ads. For motion graphics ads, prompt-based tools like fluos recompose the layout for each format instead of cropping it.