Every platform crops and scales images differently, and an upload that looks right on your screen can arrive with the subject's head cut off or a blurry, stretched banner. Below are the image sizes the tools on this page produce for each platform, and the tools themselves resize and crop your photo to those dimensions in your browser — without uploading it anywhere.
Image sizes by platform
| Platform | Image | Size (pixels) | Shape |
|---|---|---|---|
| Square post | 1080 × 1080 | 1:1 | |
| Portrait post | 1080 × 1350 | 4:5 | |
| Story or Reel | 1080 × 1920 | 9:16 | |
| YouTube | Thumbnail | 1280 × 720 | 16:9 |
| YouTube | Channel art | 2560 × 1440 | 16:9 |
| X (Twitter) | Header | 1500 × 500 | 3:1 |
| X (Twitter) | Post image | 1600 × 900 | 16:9 |
| Page cover | 820 × 312 | about 2.6:1 | |
| Post image | 1200 × 630 | about 1.9:1 | |
| Profile photo | 400 × 400 | 1:1 | |
| Profile banner | 1584 × 396 | 4:1 | |
| Post image | 1200 × 627 | about 1.9:1 | |
| Discord | Server banner | 960 × 540 | 16:9 |
| Discord | Profile banner | 680 × 240 (older help page: 600 × 240) | about 2.8:1 |
| Twitch | Emote (manual upload) | 112 × 112, 56 × 56 and 28 × 28, transparent PNG | 1:1 |
| Standard pin | 1000 × 1500 | 2:3 | |
| TikTok | Video cover | 1080 × 1920 | 9:16 |
The Instagram, YouTube, X and Facebook sizes were re-checked in September 2026, the Discord sizes on 1 October 2026 from Discord’s help centre. Platforms change their layouts without much notice — in 2026 Instagram switched its profile grid preview to a 3:4 shape, although 1080 × 1350 is still the size for portrait posts in the feed.
Safe zones matter as much as size
Some images are shown in full on one device and cropped on another. A YouTube channel banner is 2560 × 1440 pixels, but only a narrow strip in the middle is visible on every screen. An X header is partly covered by your profile picture, and a Facebook cover is cropped at the sides on phones. The tools for these formats mark the area that is always visible, so text and faces don't end up hidden.
One photo, every platform
If you are posting the same picture in several places, the Social Media Image Resizer exports all the sizes you select in one go, each cropped around a focal point you set once. For a single platform, the dedicated pages are quicker because the right size is already selected.
Platforms re-encode whatever you send
Every major platform re-compresses uploads to its own settings. You cannot switch that off, which is why an image that looked perfect on your screen can arrive soft or blotchy. What you can control is how much work the platform's encoder has to do: an image already at the right dimensions and a sensible quality gives it little to change, while a 9 MB camera file gets resized and re-compressed in one aggressive pass.
So the practical routine is: resize to the platform's stated size, keep quality high but not maximal, and upload that. Sending the biggest file you have is the common mistake — it does not preserve quality, it hands the decision to someone else's encoder.
Sizes change; the shape of the problem does not
Platforms adjust their layouts, and any list of exact pixel dimensions ages. Two things stay true regardless: the aspect ratio matters more than the absolute pixel count, and the centre of the frame is the only part guaranteed to survive cropping in every context. Keep faces, logos and text away from the edges and a single image will hold up across a feed, a preview card and a profile header.
If your image is going somewhere these presets do not cover, the plain resize and crop tools take exact pixel values, and target-size compression handles any upload limit attached to it.
Private by default
Resizing and cropping happen on your own device. Your photos are never uploaded, there is no account, and nothing is added to the image — no watermark, no branding.