How to Resize Images for Social Media (2026 Sizes)

You post a photo that looked fine on your phone, and the app crops the top of someone's head off, or drops it into a blurry letterbox with grey bars down the sides. The picture was never the problem. The size was. Every social platform expects images at a particular shape and a particular resolution, and when yours does not match, the platform either crops it to fit or shrinks and recompresses it until it looks soft. This guide gives you the sizes that actually work in 2026 for each platform, explains the handful of aspect ratios that sit behind all of them, and shows you how to resize any photo to fit, free, in your browser, without uploading it anywhere.

There are only about six shapes to learn, and once you have matched your image to the right one, the platform leaves it alone. The rest of this article covers the fastest way to resize, why the wrong size wrecks a good photo, the exact pixel sizes for Instagram, TikTok, X, Facebook, LinkedIn, YouTube and Pinterest, when to crop and when to pad, and the mistakes that cost people a clean-looking post.

One photo, several shapes: each platform crops to its own aspect ratio.

The fastest way: resize for a platform in your browser

The quickest route needs nothing installed and works the same on a laptop or a phone.

1. Open the Resize for Social tool in any browser.
2. Drop your image in, or click to pick it from your files.
3. Choose the platform and placement you are posting to, such as an Instagram feed post, a Story, or a YouTube thumbnail.
4. Pick whether to crop the photo to fill the frame or fit the whole thing with a border.
5. Download it. If you are posting the same image to a few places, resize it to each size in one sitting.

The reason I send people here first is that it does the shape and the resolution for you from a preset, so you are not looking up "Instagram story pixels" and typing numbers into an editor. It also runs inside your browser, on your own device, so the photo is never uploaded. That is worth more than it sounds when the image is a client's product shot, an unreleased design, or a personal photo you would rather not hand to a random website. You can check it yourself: load the tool, turn your Wi-Fi off, and resize anyway. It still works, because the file never leaves your machine.

Pick a platform preset and download. The photo is never uploaded.

Why the size matters more than you think

When you upload an image that does not match a platform's expected shape, one of two things happens, and neither is good. If the ratio is wrong, the platform crops your image to its own frame, and it crops from the center without asking, so a face or a bit of text near the edge gets cut. If the file is much bigger than the platform displays, it downsizes and recompresses your photo on its own servers, and that second round of compression is where the softness and the blocky patches come from.

Instagram, for example, shows feed images about 1080 pixels wide. Upload a photo already at 1080 wide and it barely touches it. Upload a 4000-pixel original and Instagram shrinks it and recompresses it, and you have no say in how hard. The same logic runs across every platform: the closer your image is to the size the platform actually shows, the less damage it does on the way in.

Going too small is its own trap. If you upload a 500-pixel image into a slot that displays at 1080, the platform stretches it up to fit, and upscaling a small image makes it blurry every time. Start from the largest version of the photo you have, and resize down to the target. Down is sharp. Up is soft.

The aspect ratios behind everything

Before the pixel sizes, it helps to see the shapes, because there are only a few and every platform reuses them.

1:1 is a plain square, usually 1080 by 1080. It is the safe, boring choice that works in most feeds.

4:5 is a tall portrait, 1080 by 1350. It is the tallest image Instagram allows in the feed, and because it takes up more vertical space on a phone, it pushes competing posts off the screen. For a single photo on Instagram, this is my default.

9:16 is full-screen vertical, 1080 by 1920. This is the phone-shaped frame behind Stories, Reels, TikTok, YouTube Shorts, and the Story format on Facebook and LinkedIn.

16:9 is landscape, 1280 by 720 or 1920 by 1080. It fits YouTube thumbnails and video, X images, and anything meant to look right on a desktop screen.

1.91:1 is a wide, short rectangle around 1200 by 630. It is the shape Facebook and LinkedIn use for the preview card when you share a link.

2:3 is a tall portrait, 1000 by 1500, and it is Pinterest's format. Taller pins get more room in the feed.

Six shapes cover almost everything: 1:1, 4:5, 9:16, 16:9, 1.91:1 and 2:3.

The exact sizes for each platform in 2026

Here are the sizes that fit without the platform cropping or blurring your image. Platforms adjust these from time to time, which is the main argument for using a preset that gets kept current rather than memorising numbers, but these are right as of 2026.

Instagram. A feed square is 1080 by 1080. A feed portrait is 1080 by 1350, the 4:5 shape, and it is the one I reach for because it fills the most screen. A feed landscape is 1080 by 566. Stories and Reels are 1080 by 1920. One thing to plan for on a Reel: the caption, the buttons and your username sit over the bottom of the video, so keep anything important out of the bottom quarter or so.

TikTok. Both video and photo posts are 1080 by 1920, the same 9:16 as a Story. TikTok covers the right edge with its action buttons and the bottom with the caption, so keep faces and text toward the middle.

X. An image in the timeline works best at 1600 by 900, which is 16:9. X crops very tall images hard in the timeline, so a landscape or a square is safer than a portrait. The header banner is 1500 by 500, and the profile picture is 400 by 400.

Facebook. A photo post is happy at 1080 by 1080, and a shared-link preview uses 1200 by 630. Stories are 1080 by 1920. The cover photo is the fiddly one: it shows at about 851 by 315 on a desktop but gets cropped differently on a phone, so upload something larger, around 1640 by 856, and keep the subject near the center where both crops can see it.

LinkedIn. A post image works at 1200 by 1200 for a square or 1200 by 627 for a link preview. Your personal banner is 1584 by 396. A company page cover is 1128 by 191, and the profile picture is 400 by 400.

YouTube. The thumbnail is 1280 by 720, and it has to be under 2 MB. This is the image that earns the click, so it is worth sizing properly. The channel banner is 2560 by 1440, but only the middle 1546 by 423 is visible on every device, so keep your logo and text inside that central strip or phone viewers will not see them.

Pinterest. A standard pin is 1000 by 1500, the 2:3 shape. You can go taller, but Pinterest truncates pins that are much longer than 2:3, so 1000 by 1500 is the sweet spot.

The sizes that fit each platform without cropping in 2026.

Crop to fill, or fit with a border?

Changing a photo's shape means one of two things has to give, and a good resizer lets you choose which.

Crop to fill makes the image cover the whole frame and trims whatever hangs over the edges. It looks clean with no bars, and it is the right choice when your subject sits in the middle with room around it. The risk is at the edges: crop a wide group photo down to a square and you can lose the people on the ends.

Fit with a border shrinks the whole image until it fits inside the frame and fills the leftover space with a color you pick. Nothing gets cut, which is what you want for a full graphic, a screenshot, or a product image with text near the edge. The cost is the border, though a white or on-brand background often looks deliberate rather than accidental.

The rule of thumb: crop to fill for photos, and check the subject survived the crop; fit with a border for anything with text or a hard edge you cannot afford to lose. When you crop, a tool that lets you drag the crop box means you can keep the face in frame instead of trusting an automatic center cut.

Crop to fill trims the edges; fit with a border shows everything.

Resize once, post everywhere

If you run more than one account, you already know the annoyance: the same photo needs to be a 4:5 for the Instagram feed, a 9:16 for the Story, a 16:9 for X, and a 1280 by 720 thumbnail for YouTube. Doing that by hand four times is a waste of an afternoon.

Resize the one image to each preset in a single pass instead, and download the set together. For sizes a preset does not cover, the image resizer lets you type exact width and height, which is handy for an ad slot or a banner with an odd requirement. Either way the work happens on your device, so a batch of unpublished photos stays private while you process it.

How to resize on any device

Browser, any device. The Resize for Social tool is the one I use, because it has the presets, lets you crop or pad, and never uploads the file. It works the same in Chrome, Edge, Safari and Firefox, on a computer or a phone.

Phone. The built-in crop in the Photos app can get you rough shapes, a square or a 9:16, but it will not hit exact pixel sizes or the odd link-preview ratios, and it cannot pad an image with a border. Opening the browser tool on the phone gets you the precise size on the same device.

Canva. Canva has templates named for each platform, which is fine if you are already designing there. For a plain resize of a photo you already have, it is more steps than dropping the file into a preset.

Photoshop or another editor. If an editor is already open, use Image Size to set the resolution and Canvas Size or the crop tool to set the shape, then export, using the pixel values above. This gives you full control and is worth it when you are retouching the photo anyway, but it is slow for a quick resize.

Common mistakes

Uploading the giant original and letting the platform sort it out. It crops to its own ratio from the center and recompresses as hard as it likes. Size the image yourself and you keep control of both.

Using a square for everything. A 1:1 photo dropped into a 9:16 Story leaves big empty bars top and bottom, and wastes the space that makes vertical posts stand out. Match the shape to the placement.

Forgetting the safe zone. Reels and TikTok cover the bottom and right edges with buttons and captions, and a YouTube banner only shows its center strip on phones. Keep faces, logos and text away from the edges.

Upscaling a small image. Blowing a 500-pixel image up to 1080 makes it soft. Always start from the biggest copy of the photo you have.

Ignoring the file-size cap. A YouTube thumbnail has to be under 2 MB, and some upload forms are stricter still. If your resized image is too heavy, run it through a compress tool to bring the size down without changing the dimensions.

Keeping your images private

Most of what people resize for social is not sensitive, but some of it is: a client's campaign before it launches, a product that has not shipped, a personal photo going only to close friends. Most online resizers upload your image to their servers to do the work, which leaves a copy on a machine you do not control, under terms you probably did not read.

A browser-based resizer avoids that. The image is opened and resized on your own device, and nothing is sent over the network. There is no server copy and no account tying the photo to your name. For anything you would not want sitting on a stranger's server, that is the difference that matters, and it costs you nothing in speed.

Last word

Social image sizes look like a long list, but they come down to six shapes, and matching your photo to the right one is what stops the platform cropping or blurring it. Post 4:5 or 1:1 to a feed, 9:16 to Stories, Reels and TikTok, 16:9 to YouTube and X, and start from the largest original you have so the resize only ever shrinks. Keep faces and text out of the edges where the app's buttons sit.

When you have a photo to post right now, open the Resize for Social tool, pick the platform, choose crop or border, and download it in a couple of clicks. It is free, it works on any device, and the image never leaves your browser.