Social media image sizes in 2026

Exact pixel dimensions for social platforms shift every time a platform redesigns its feed, but the aspect ratio — the proportion between width and height — barely moves, because it's tied to the screen format itself: vertical mobile, square feed, widescreen video player. Learn to reason in ratios instead of memorizing a pixel chart and the exact numbers stop mattering so much. Crop your source image to the right ratio first with crop image, then set the final pixel dimensions with resize image.

Why your photo gets cropped when you post it

Every platform reserves a fixed-ratio container for each content type: the main feed uses a different container than Stories, and a cover photo uses a different one than a video thumbnail. When you upload an image that doesn't match that ratio, the platform doesn't letterbox it with blank bars in most cases — it scales the image to fill the container and crops whatever spills over, almost always from the center.

That's the classic complaint: you upload a beautiful landscape shot meant to be seen in full, the platform forces it into a square or vertical container, and the automatic crop slices off a head, eats the breathing room around your subject, or cuts a caption you placed off to one side. The fix isn't hoping the platform's auto-crop algorithm gets it right — it's deciding the framing yourself before you upload.

The five ratios that cover almost everything

Instead of memorizing a separate chart for every platform, memorize five proportions. Nearly every content slot on social media maps to one of these:

• 1:1 (square): the universal feed ratio. Works cleanly on Instagram, Facebook, X and LinkedIn without odd cropping, since a square fits a landscape container about as well as a portrait one.
• 4:5 (portrait feed): taller than it is wide, and it claims more screen real estate on a mobile scroll than a square does. It tends to outperform square posts in feed placements where stopping the scroll is the whole goal.
• 9:16 (full-screen vertical): the format behind Stories, Reels, TikTok and Shorts. It fills a phone screen held vertically. If your content is built for short-form video or Stories, this is the native ratio to shoot in, not something you crop down to afterward.
• 16:9 (landscape): the standard video and desktop-screen ratio. It dominates YouTube thumbnails, channel banners and most embedded video players.
• 1.91:1 (wide landscape): slightly wider than 16:9. It's the ratio used by link preview cards — the box showing image, title and description when you share a URL.

Once you know which of these five slots your image will live in, you know the ratio to crop to — no need to look up the exact pixel figure until the last step.

The safe zone: why the edges are off-limits

Automatic cropping isn't the only edge risk. Plenty of platforms lay their own UI on top of your image: a Story overlays the username and reaction icons in fixed bands at the top and bottom; a video thumbnail gets the duration badge stamped in a corner. Put important text, a logo, or — especially — a face too close to the edge, and it risks getting covered by that interface or clipped by a crop different from the one you tested against.

The practice that avoids most of this: leave generous safe margin around whatever matters most in the composition. Center faces and text, and treat the outer 10-15% of the frame as territory nothing critical should touch.

Thumbnails don't always crop like the full view

One detail that trips people up: the feed thumbnail and the expanded view aren't always the same crop, especially for video. It's common for a platform to apply a tighter crop to the thumbnail — to pack more content into less screen space — and only reveal the full frame once someone opens the post. A logo or caption that looks fine expanded can vanish in the thumbnail if it sits near the edge. The only way to know is to check how your content actually renders in both states before publishing, rather than assuming one is just a scaled-down copy of the other.

What resolution to upload at (bigger isn't automatically better)

Upload somewhat above your final display resolution, since nearly every platform recompresses files on upload, and that recompression softens detail. A reasonable resolution buffer absorbs that loss. But overshooting doesn't help either — a file ten times larger than it needs to be won't look sharper, because the platform compresses it down regardless. All you gain is a slower upload and, in some cases, more aggressive compression triggered by the file's size. If your source photo is already too heavy, run it through compress imagefirst so you control the quality tradeoff instead of leaving it to the platform's algorithm.

The circular profile picture is a special case of ratio cropping

Almost every platform asks for a square (1:1) file for your profile picture, then displays it cropped into a circle. That circular crop is more aggressive than the square original — it eats all four corners. A subject centered with margin around it survives the circular crop fine; a subject pushed into a corner or against the square's edge falls outside the visible circle and disappears. Always upload the full square file with your subject well-centered — never a crop that's already tight against the frame.

File format matters too

Ratio and resolution solve the framing, but file format affects how the result holds up after the platform's own recompression. For photos with lots of tonal gradients, JPG is usually enough; for logos, screenshots, or images with crisp text and hard edges, PNG holds contrast better. If you need to switch formats before uploading, convert image handles it without sending the file anywhere — it runs in your browser, same as cropping and resizing, which matters if you're working with photos that still carry location metadata you'd rather not hand to a third-party service. And if you need to stamp your images before publishing — a username or logo watermark — add watermark handles that step in the same local workflow.

The rule that survives every redesign

Be honest about one thing: any pixel chart you read today — this one included — can go stale the next time a platform redesigns its feed. Exact figures drift; reasoning by aspect ratio doesn't. Before a campaign that actually matters, double-check the current exact dimension in that platform's own documentation. But for everyday work, picking the right ratio (1:1, 4:5, 9:16, 16:9, or 1.91:1), leaving safe margin at the edges, centering your profile picture properly, and uploading at a reasonable resolution will get you out of most trouble without memorizing a single pixel figure.

Frequently asked questions

Related tools

• Crop image — Frame to 1:1, 4:5, 9:16, 16:9 or any ratio you need.
• Resize image — Set the final pixel dimensions before you upload.
• Compress image — Shrink file size without visible quality loss.
• Add watermark — Stamp your images before you publish them.