Why Image Dimensions Matter on Social Media

Every social media platform has its own preferred image dimensions, and uploading the wrong size leads to automatic cropping, blurry images, or white bars appearing around your content. Facebook and Instagram auto-crop square images for feed posts if they are too tall. LinkedIn compresses oversized images, reducing quality. Twitter/X stretches portrait images horizontally in the timeline preview. Getting the dimensions right means your image appears exactly as you intended — without the platform deciding how to crop or resize it for you.

Instagram Image Sizes (2026)

Instagram supports three aspect ratios in the feed: square (1:1), portrait (4:5), and landscape (1.91:1). Recommended dimensions: Feed square: 1080 × 1080 px. Feed portrait: 1080 × 1350 px (the maximum height Instagram allows; gives the most screen space). Feed landscape: 1080 × 566 px. Reels: 1080 × 1920 px (9:16 full screen). Stories: 1080 × 1920 px (9:16 full screen). Profile photo: 320 × 320 px (displayed at 110 px on mobile). The portrait format (1080 × 1350) is recommended for maximum feed real estate — it takes up the most vertical space on the screen, which means more attention before the user scrolls past.

Facebook Image Sizes (2026)

Facebook has different placements with different size requirements. Feed post: 1200 × 630 px (1.91:1 ratio). Story: 1080 × 1920 px. Cover photo (page): 820 × 312 px (displays at 820 × 312 on desktop, 640 × 360 on mobile — keep critical content centred). Profile photo: 170 × 170 px (displayed at 128 × 128 on desktop). Event cover: 1920 × 1080 px. Shared link image (OG image): 1200 × 630 px — this is also the standard size for og:image meta tags used across many platforms. Facebook applies heavy compression to images. Upload in PNG for graphics with text; use JPG for photographs.

Twitter / X Image Sizes (2026)

Twitter (now X) displays images differently depending on how many images are in the tweet. Single image in tweet: 1600 × 900 px (16:9) or up to 1200 × 675 px; minimum 600 × 335 px. Profile photo: 400 × 400 px (displayed as a circle). Header/banner: 1500 × 500 px. Twitter card (link preview): 1200 × 628 px. For single tweet images, a 16:9 ratio (1600 × 900) fills the preview perfectly without cropping. Portrait images (taller than 3:4) will be cropped in the timeline view with a 'tap to expand' prompt.

LinkedIn Image Sizes (2026)

LinkedIn is a professional platform with stricter quality expectations. Feed post: 1200 × 627 px (1.91:1). Square post: 1080 × 1080 px. Portrait post: 1080 × 1350 px. Cover image (personal profile): 1584 × 396 px. Company page logo: 300 × 300 px. Company page cover: 1128 × 191 px. Article header: 1200 × 644 px. LinkedIn displays images at higher resolution on desktop than other platforms, so always upload at the recommended dimensions — not smaller. Low-resolution images appear noticeably pixelated on the LinkedIn feed.

YouTube, TikTok, and Pinterest

YouTube: Channel art (banner): 2560 × 1440 px (must display well from 1546 × 423 safe zone for TV down to 1546 × 423 on desktop). Profile photo: 800 × 800 px. Thumbnail: 1280 × 720 px (16:9) — the most important YouTube image; use high contrast and readable text. TikTok: Profile photo: 200 × 200 px. Video: 1080 × 1920 px (9:16). TikTok is video-first; still images perform poorly — always create vertical video content. Pinterest: Standard pin: 1000 × 1500 px (2:3 ratio). Square pin: 1000 × 1000 px. Tall pin (max): 1000 × 2100 px. Pinterest is a visual search engine — taller pins (2:3) get more real estate and clicks than square ones.

How to Resize Images for Free Online

The Image Resizer at allio.tools/tools/image/image-resizer/ lets you enter exact pixel dimensions and resize any uploaded image instantly in your browser. Upload your image, type the target width and height (e.g., 1080 × 1350 for an Instagram portrait), and download the resized result. You can maintain the aspect ratio automatically or enter custom dimensions for each platform. For social media posts, also consider using the Image Compressor at allio.tools/tools/image/image-compressor/ after resizing — it reduces file size without visible quality loss, which speeds up uploads and reduces storage. All processing is client-side; your images are never uploaded to a server.