Social Media Image Sizes and How to Resize Right

Each social platform has its own recommended image size and ratio. Posting an image at the wrong size can crop away the part you wanted to show, add padding that shrinks it, or stretch it until it looks rough.

Preparing an image at the size your destination expects keeps your intended composition and makes the thumbnail look consistent. If you post the same image to several platforms, exporting it at each size is the safe approach.

Here are common size guidelines. An X (Twitter) post image is around 1600×900 (16:9), an Instagram post is a 1080×1080 square, an Instagram Story is a tall 1080×1920, and a YouTube thumbnail is 1280×720.

In addition, a LINE icon is a 640×640 square, a note header is 1280×670, a Qiita article (OGP) image is 1200×630, and a Facebook post is around 1200×630. Specs can change, so for important posts it is worth checking each service's latest official guidance.

There are two main ways to resize. Cover fills the target size with the image and crops whatever overflows. It works well when you want a photo to look bold or when the subject is centered.

Contain scales the whole image to fit and fills the empty space with a background color. It suits diagrams, logos, or images where cropping the edges would be a problem. Both modes keep the aspect ratio, so there is no stretching or distortion.

Changing the size by hand for each destination is tedious. Filewisp's Social Media Image Resizer lets you pick a preset for X, Instagram, YouTube, and more, and converts to the right size. It supports cover/contain and a background color, all processed in your browser.

You can also generate every preset from one image and download them together as a ZIP. That removes a lot of the export work when you want to publish across several platforms at once.

If you add text or a logo, keep it away from the very edge with a little margin so it does not get cut off when cropped or shown in another environment. Thumbnails are often small, so it reads better when you do not cram in too much.

Use a large enough source image so it stays clean when scaled down to each size. Upscaling a small image looks rough, so secure enough resolution at the capture or export stage.

Before posting, confirm the image matches the destination ratio, that the important part is not cut off, and that any text is readable. Previewing the actual appearance before you post is the reliable way to avoid surprises.

After fixing the size, compressing it if needed keeps the file lighter and the display faster. A small adjustment for each platform can change how the same image looks and performs.