Facebook Ads Aspect Ratio Checker
Drop a creative or enter its pixel size and see exactly which Meta placements it clears - Feed, Stories, Reels, in-stream - plus the closest supported ratio and the size to export at. Free, no signup, nothing uploaded.
Drop an image here, or click to choose
The image never leaves your browser - dimensions are read locally. Or type the size below.
Aspect ratio
4:5
0.8 : 1
Orientation
Portrait
1080 x 1350 px
Closest Meta ratio
4:5
Export 1080 x 1350
Where this fits in Meta
4:5 is the ratio Meta recommends for Feed - the tallest it allows, so it takes the most screen real estate.
Recommended: 4:5 (1080 x 1350)
Vertical but not 9:16. It runs, but Meta adds background padding above and below. 9:16 removes the bars.
Recommended: 9:16 (1080 x 1920)
Vertical creative in a landscape slot gets pillarboxed. Use a 16:9 or 1:1 cut for in-stream.
Recommended: 16:9 (1920 x 1080)
Name the file so it auto-groups at launch
Once a master file clears its ratio, the filename is what tells a bulk launcher which placement it belongs to. uplads reads tokens like 4x5 from the filename and merges the matching variants into one ad that serves the vertical cut in Stories/Reels and the default cut in Feed - no per-placement clicking.
spring_hook_a_4x5.jpgHow to use this aspect ratio checker
Drop an image into the box and the tool reads its pixel dimensions locally - the file never leaves your browser. If you only know the size (a video, or a spec from a designer), type the width and height instead. The tool reduces the dimensions to a clean aspect ratio, names the orientation, and then checks that ratio against each major Meta placement: Facebook and Instagram Feed, Stories and Reels, and in-stream video. Each placement comes back as a perfect fit, supported, or cropped / padded, with the recommended ratio and the exact pixel size to re-export at if it is not ideal.
What is an aspect ratio?
An aspect ratio is the relationship between an image or video's width and its height, written as two numbers like 4:5 or 9:16. It is independent of the actual pixel count: a 1080 x 1350 image and a 1600 x 2000 image are both 4:5. Meta cares about the ratio because every placement has a fixed shape - a Reel is a tall rectangle, a Feed slot is a near-square - and a creative whose ratio does not match that shape has to be cropped or padded to fit. Yes, 1920 x 1080 is a 16:9 ratio, and 1080 x 1920 is its vertical inverse, 9:16.
The aspect ratios Meta actually uses
There are only a handful that matter in 2026. 4:5 (1080 x 1350) is the recommended ratio for Facebook and Instagram Feed - it is the tallest shape Feed allows, so it takes the most screen space. 1:1 (1080 x 1080) is a square that displays uncropped in Feed and the right column and is the safe travels-everywhere option. 9:16 (1080 x 1920) is the full-screen vertical for Stories and Reels. 16:9 (1920 x 1080) is the landscape ratio for in-stream video, and 1.91:1 is the wide ratio used by link and landscape image ads. Feed supports anything between 1.91:1 and 4:5; go more vertical than 4:5 and Meta crops it back to 4:5 for you.
What happens when the ratio doesn't match the placement
Meta does not reject a mismatched creative - it adjusts it, which is worse, because you lose control of the result. A 9:16 video forced into Feed gets cropped to 4:5 and the top and bottom of your framing disappear. A 1:1 square in Reels gets large background bars above and below, so your full-screen placement is now a small square in a sea of blur. The ad still spends money; it just spends it on a worse version of your creative. Checking the ratio before launch is the cheapest creative fix there is: it costs a re-export, not a reshoot.
Can one creative cover every placement?
A single 1:1 square technically displays in every placement, which is why rushed launches default to it. But it is a compromise everywhere and ideal nowhere: shorter than 4:5 in Feed, heavily letterboxed in Reels. The setup most performance teams settle on is two exports per concept - a 4:5 master for Feed and a 9:16 master for Stories and Reels - because those two placements carry the spend. That is also why multi-placement delivery exists: one ad, two ratios, the right one shown per placement. Use this checker to confirm each master is correctly sized before it goes near a launch.
Why ratio is really a creative-velocity problem
Checking one image is trivial. The real cost shows up at volume. A weekly creative test with five concepts, each in a 4:5 and a 9:16 cut, is ten files - and every one has to be the right ratio, named so the launch tool knows where it belongs, and matched to its sibling. Get one wrong and you find out from a letterboxed ad in reporting three days later. uplads was built inside an Austrian performance marketing agency where that exact grind - renaming and re-grouping dozens of placement variants every launch - was the Monday-morning tax. The tool does not check or crop your ratios for you (that is what this page is for, before upload); what it does is read the placement token in the filename - 4x5, 9x16, 1x1 - and merge the matching variants into a single ad that serves the vertical cut in Stories and Reels and the default cut in Feed, with no per-placement clicking. Correct ratio in, correctly grouped ad out.
The workflow that keeps ratios clean at scale
Three steps, repeatable forever. First, export every concept at its placement-correct ratio - 4:5 for Feed, 9:16 for Stories and Reels - and run each through the checker above so a wrong size never reaches a launch. Second, name the file with the placement token so the launcher can group it, the same way names should be generated rather than typed with the naming convention generator. Third, drop the whole set into a bulk launch and let the matching ratios collapse into one multi-placement ad each. The discipline that scales is not checking harder - it is making the correct ratio the default at export and letting the grouping happen automatically after that. Pair this with the UTM builder so sizing, grouping, and tracking are all decided once instead of per ad.
Frequently asked questions
What aspect ratio should I use for Facebook ads?
Use 4:5 (1080 x 1350) for Feed and 9:16 (1080 x 1920) for Stories and Reels. Those two cover the placements where most budget is spent. 1:1 (1080 x 1080) is a safe square fallback that displays uncropped in Feed. 4:5 is preferred over 1:1 for Feed because it is the tallest ratio Meta allows there, so it takes the most screen space on a phone.
What happens if my aspect ratio doesn't match the placement?
Meta does not reject the ad - it adjusts it. In Feed, anything taller than 4:5 is cropped to 4:5, and anything wider than 1.91:1 is cropped on the sides. In Stories and Reels, a non-9:16 creative gets background padding (letterbox bars) or, if it is landscape, large empty space. The ad still runs, but you lose control of the crop and usually screen real estate. Exporting at the placement's recommended ratio means you decide what stays in frame, not the algorithm.
Should I use 1:1 or 4:5 for Facebook feed ads?
4:5. Both are fully supported in Feed, but 4:5 is the tallest ratio Feed allows, so it occupies more vertical space on a mobile screen than a 1:1 square - more pixels means more attention. Use 1:1 only when the same asset also has to work in a square-only placement and you do not want to maintain two exports.
What is the best aspect ratio for Instagram Reels ads?
9:16 (1080 x 1920). Reels and Stories are full-screen vertical placements, and 9:16 fills the entire screen edge to edge. Any other ratio either gets letterboxed with background bars or, if it is square or landscape, leaves large empty regions that read as low-effort. Keep important elements away from the very top and bottom so captions and the profile bar do not cover them.
Can I use one creative for all Meta ad placements?
You can, but you usually shouldn't. A single 1:1 square will display everywhere, but it wastes space in Feed (where 4:5 is taller) and gets heavily letterboxed in Stories and Reels. The standard 2026 setup is two exports of each concept: a 4:5 for Feed and a 9:16 for Stories and Reels. The checker above tells you which placements a given file actually clears so you know whether you need the second export.
Does aspect ratio affect ad performance?
Indirectly but meaningfully. The ratio itself is not a ranking factor, but a creative that fills the screen in its placement gets more attention than the same creative shrunk into a letterboxed box, and attention drives the engagement signals that lower cost. Using the placement-correct ratio is one of the cheapest creative improvements available because it costs an export, not a reshoot.
Is there a free Facebook ads aspect ratio checker?
Yes. This one is free, needs no signup or email, and runs entirely in your browser - the image never leaves your device, only its pixel dimensions are read. Unlike a static spec table, it evaluates your actual file and tells you, per placement, whether it is a perfect fit, supported, or going to be cropped, plus the exact size to export at.
Right ratio in, correctly grouped ad out
Once your masters are the right size, naming and grouping them by hand across a 50-ad creative test is the slow part. uplads reads the placement token in each filename and ships one multi-placement ad per concept - the vertical cut in Stories and Reels, the default in Feed - in a single bulk launch. Save the hours a week that manual re-grouping eats.