How to Resize Images for Social Media: The Complete 2026 Size Guide

You spend real effort on a photo, post it, and the platform crops off the top of someone's head or renders it soft and pixelated. It's one of the small, persistent frustrations of posting online — and it's almost always a sizing problem, not a photography one. Every network expects images at particular dimensions and aspect ratios, and when your file doesn't match, it gets cropped or upscaled to fit. This guide lists the sizes that actually matter in 2026 and shows how to hit them in seconds.

Two Numbers That Decide Everything

Before the tables, the concepts. Two things determine how your image renders: its aspect ratio (the shape — square, portrait, landscape) and its resolution (the pixel dimensions). Aspect ratio decides whether the platform crops your image; resolution decides whether it looks sharp. Match the ratio and nothing gets cut off. Meet or slightly exceed the display width and nothing looks blurry. Get both right and your image appears exactly as you intended.

Instagram

• Square post: 1080×1080 (1:1)
• Portrait post: 1080×1350 (4:5) — the most feed space you can claim
• Landscape post: 1080×566 (1.91:1)
• Stories & Reels: 1080×1920 (9:16)
• Profile photo: 320×320 (displayed as a circle)

Instagram displays feed images at 1080px wide, so that's your target width. Portrait 4:5 is the workhorse for reach because it fills more of the vertical feed than a square.

Facebook

• Shared post (landscape): 1200×630 (1.91:1)
• Square post: 1080×1080 (1:1)
• Stories: 1080×1920 (9:16)
• Profile photo: 170×170 minimum
• Cover photo: 851×315 on desktop

The 1200×630 landscape is also the standard for link-preview images — the same dimensions used for Open Graph cards across the web, which is why it's such a safe default.

LinkedIn

• Shared post image: 1200×627 (1.91:1)
• Square post: 1080×1080 (1:1)
• Profile photo: 400×400 recommended
• Personal cover / background: 1584×396
• Company page logo: 300×300

X (Twitter)

• In-stream (landscape) image: 1600×900 (16:9)
• Square image: 1080×1080 (1:1)
• Profile photo: 400×400 (displayed as a circle)
• Header / banner: 1500×500 (3:1)

X compresses aggressively, so uploading at a generous resolution like 1600×900 gives the recompression more to work with and keeps your image looking clean in the timeline.

A Few Rules That Cut Through the Numbers

• 1080px wide is the universal safe width. Almost every feed displays around it, so a 1080px-wide image looks sharp nearly everywhere.
• Vertical wins on mobile. 4:5 and 9:16 fill more of a phone screen and stop the scroll; landscape leaves empty bands.
• Keep important content away from the edges. The same image is cropped differently across placements — keep faces and text safely inside the frame.
• Design your link-preview card at 1200×630. It's the one ratio shared by Facebook, LinkedIn and web Open Graph previews.

How to Resize in Your Browser — Free and Private

You don't need Photoshop or an account for this. With ImageMarker's resize tool you can hit any of these dimensions in seconds, and because it runs entirely in your browser, your images are never uploaded to a server.

1. Open imagemarker.app/en/resize and add your image.
2. Enter the target dimensions for your platform — say 1080×1350 for an Instagram portrait post.
3. Download the resized image, ready to post.

For the best result, resize first and then run the file through a compressor so it loads fast without visible quality loss — and if the image is your own work, add a watermark before it goes public.

FAQ

Q: What is the best image size for an Instagram post in 2026?
A: 1080×1080 for square, 1080×1350 for portrait (best reach), and 1080×1920 for Stories and Reels.

Q: Why do my social media images look blurry or get cropped?
A: Blur means the image was smaller than the display width and got upscaled; cropping means the aspect ratio didn't match. Resizing to the correct dimensions fixes both.

Q: Should I resize images before uploading to social media?
A: Yes — it gives you control over the crop, keeps images sharp, and reduces file size so posts load faster.

Q: How can I resize images for social media for free?
A: Use ImageMarker's resize tool — enter the dimensions and download. It runs in your browser with no upload.