Every platform wants a different image size, and a wrongly sized photo gets cropped or blurred. Learn the standard sizes for the major platforms and how to resize in seconds.
By Ernzi Tools team · November 7, 2026
You post a photo, and the platform crops off the top of someone's head — or squeezes it into a blurry thumbnail. Every social network has its own preferred image sizes, and they change them more often than anyone would like. The fix is simple: resize your image to the right dimensions before you post, and you control exactly what people see.
A social platform does three things to an image you upload: it resizes it, it compresses it, and it crops it to fit the slot it was designed for. If your image is much larger than the slot, the platform throws away most of the pixels and you have wasted upload time and data. If it is smaller, the platform stretches it and it looks soft or pixelated. If the aspect ratio is wrong — a wide landscape photo in a square slot — the platform crops the edges, and it crops from the center, which is rarely where the interesting part is. Resizing first means the platform has nothing left to decide.
Sizes drift over time, but the standard dimensions below are the ones that work across the major platforms right now. When in doubt, use the larger size — platforms downscale gracefully, but they cannot add detail to an image that is too small.
Dimensions are only half the story; the shape matters just as much. A 1080 × 1080 image is square (1:1). A 1080 × 1920 story is 9:16. A 1200 × 630 link preview is about 1.91:1. If you resize a photo without keeping its aspect ratio, people and objects stretch — everyone looks taller and thinner, or shorter and wider. Always resize by scaling, not by squashing: change the width and let the height follow, or crop to the target shape first and then resize. Cropping is the honest way to change shape, because it removes pixels instead of distorting them.
For photographs, JPG is the right choice: it keeps file sizes small and every platform accepts it. Save at quality 80–85 and the image will look crisp while staying well under upload limits. Use PNG only for graphics with text, logos, or sharp lines, where JPG's lossy compression would blur the edges — and for anything that needs a transparent background, since JPG cannot do transparency at all. A PNG photograph is several times larger than the same image as a JPG for no visible benefit, so it is wasted bandwidth on a platform that will compress your upload a second time anyway.
The most common mistake is uploading the full-resolution original and trusting the platform to handle it. It will — but it will also apply its own aggressive compression on top of your file, and the result is often worse than a properly resized upload. The second mistake is upscaling a small image to a large target: a 500-pixel photo stretched to 1080 pixels does not gain detail, it just gains blur. The third is forgetting about safe zones: on stories and cover images, keep text and faces away from the edges, because buttons, captions, and profile overlays cover the top and bottom of the frame.
Resizing is a thirty-second task once you know the target size. Keep a short list of the dimensions you use most, resize before you post, and your images will look the way you intended — on every platform, every time.
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