Social media
image sizes.
The 2026 size cheat sheet, plus a cropper that resizes any image to the exact dimensions each platform wants. All in your browser.
Choose an image to start cropping
Drag the image to reposition. Output is the exact target size. Nothing is uploaded.
Cheat sheet
2026 image sizes by platform.
| Platform | Format | Size (px) | Ratio |
|---|---|---|---|
| Square post | 1080 x 1080 | 1:1 | |
| Portrait post | 1080 x 1350 | 4:5 | |
| Story / Reel | 1080 x 1920 | 9:16 | |
| TikTok | Video / cover | 1080 x 1920 | 9:16 |
| X (Twitter) | In-stream image | 1600 x 900 | 16:9 |
| X (Twitter) | Header | 1500 x 500 | 3:1 |
| Shared image | 1200 x 627 | 1.91:1 | |
| Cover (company) | 1128 x 191 | 5.9:1 | |
| Feed image | 1200 x 630 | 1.91:1 | |
| Story | 1080 x 1920 | 9:16 | |
| YouTube | Thumbnail | 1280 x 720 | 16:9 |
| YouTube | Channel banner | 2560 x 1440 | 16:9 |
| Standard pin | 1000 x 1500 | 2:3 | |
| Open Graph | Link preview | 1200 x 630 | 1.91:1 |
How the cropper works
Pick an image and a target size. Drag to reposition and use the zoom slider to frame the shot. When it looks right, download a PNG or JPG at the exact pixel dimensions, ready to upload. The whole thing runs locally in your browser, so your image is never sent anywhere.
Why the right size matters
Every platform crops and recompresses images that do not match its expected dimensions. Starting at the correct size keeps your visuals sharp, stops faces and text getting cut off, and makes link previews look intentional instead of stretched.
Sized and cropped? PostSider lets you attach the image, write once and publish it across every platform from a single composer.
FAQ