Social Media Image Size Checker

What size is a YouTube thumbnail?

YouTube's help pages state 3840 x 2160 pixels at a 16:9 aspect ratio for video thumbnails, with a minimum width of 640 pixels, JPG or PNG format, and a maximum of 2 MB on mobile or 50 MB on desktop. Shorts thumbnails are 2160 x 3840 at 9:16 with a minimum height of 640 pixels. Most guides still quote the older 1280 x 720 figure.

What size is an Instagram post?

Instagram supports three feed ratios: 1:1 square at 1080 x 1080, 4:5 portrait at 1080 x 1350, and 1.91:1 landscape at 1080 x 566. Portrait takes the most vertical space in the feed. Instagram enforces the ratio rather than publishing a pixel spec, and 1080 pixels is the widest it renders.

What size is a YouTube banner?

YouTube recommends 2560 x 1440 pixels for best display across devices including TV. The minimum upload is 2048 x 1152 at 16:9, the safe area for text and logos is 1235 x 338 at that minimum size, and the file must be 6 MB or smaller.

What size are Instagram Reels and Stories?

Both use 1080 x 1920 at a 9:16 aspect ratio. Keep important text out of the bottom third, where the caption, username and action buttons are drawn over the video.

What size is a TikTok video?

1080 x 1920 at 9:16, the same full-screen vertical frame as Reels and Stories. Keep captions clear of the right edge and the bottom, where TikTok's own interface sits.

Does image size affect reach?

Not directly. No platform ranks content by resolution. What it affects is whether your image gets cropped badly or looks soft, both of which influence whether someone stops scrolling, and that does matter.

Should I upload larger images than the recommended size?

Slightly larger is fine and often better, because platforms scale down cleanly. Scaling up never looks good, so exporting below the target is the mistake to avoid. Very large files just get compressed anyway.

Why does my image get cropped?

Because its aspect ratio does not match what the placement expects. A 16:9 photo in a 4:5 feed slot has to lose something from the sides. Matching the ratio first, then the pixel size, prevents it.

What is a safe area?

The portion of an image guaranteed to stay visible after cropping across devices. YouTube publishes one for channel banners because a banner is cropped differently on phone, desktop and TV. Keeping logos and text inside it is the difference between a banner that works everywhere and one that only works on your screen.

Is this tool free?

Yes. It runs in your browser, nothing is uploaded, and it works from two numbers you type rather than from your actual image file.