Social Media Image Sizes in 2026 (and How to Resize for Each)

Every platform crops, squeezes or blurs images that arrive at the wrong size — and "the wrong size" is different on every platform. Here are the dimensions that matter in 2026, followed by the two-minute workflow to hit them exactly.

The sizes that matter

Instagram: posts 1080×1350 (4:5 portrait — takes the most feed space; square 1080×1080 still works), Stories and Reels 1080×1920 (9:16), profile picture 320×320. Facebook: shared images 1200×630, cover photo 820×312, profile 170×170. X (Twitter): in-stream images 1600×900, header 1500×500. LinkedIn: shared images 1200×627, personal cover 1584×396, company logo 300×300. TikTok: video and photo-mode 1080×1920, profile 200×200. YouTube: thumbnail 1280×720, channel banner 2048×1152 (with the safe area in the middle 1235×338), avatar 800×800 — our thumbnail guide goes deeper. Pinterest: pins 1000×1500 (2:3).

Why exact sizes beat "close enough"

Upload the wrong aspect ratio and the platform decides what to cut — usually someone's forehead or your headline. Upload too small and it stretches into blur; comically large and aggressive recompression adds artifacts. Matching the native size keeps the crop, the sharpness and the compression under your control.

The two-minute workflow

Open FileLark's image resizer, drop your image, switch to exact-pixels mode and enter the target dimensions — with the aspect-ratio lock on, it fits your image inside the box without distortion. Batch mode applies one size to a whole folder, handy for resizing a campaign's worth of visuals in one pass. Everything runs in your browser, so client work and unreleased creatives never touch a server.

Then compress: platforms cap file sizes (and recompress big uploads badly), so run the result through the image compressor — under 1 MB is a safe universal target, under 200 KB for anything that's mostly a thumbnail. iPhone screenshots and photos in HEIC format? Convert them first with HEIC to JPG, since most platforms and schedulers still reject HEIC uploads.

Three habits that keep images sharp

Start from the largest original you have and scale down — enlarging can't invent detail. Keep text and faces away from the edges, where platform crops bite first. And export a fresh size per platform instead of reusing one compromise image everywhere: the 20 seconds per variant is the visible difference between a feed that looks professional and one that looks resized by the algorithm.