Image Dimension Checker: Check Width, Height and Aspect Ratio
Upload an image locally to check image dimensions before you choose a YouTube thumbnail, Shorts cover frame, profile picture, banner, or safe-area workflow.
Reports
width, height, ratio
Matches
thumbnail, Shorts, profile, banner
Privacy
browser-only check
Next step
recommended guide
What this checker reads
The checker reads File name, Width, Height, File size, Format or MIME type, Aspect ratio, Megapixels, Orientation, Nearest platform match, and Suggested next page.
It is meant for fast export decisions: first confirm the raw image size, then open the matching YouTube guide for upload limits, safe areas, crop behavior, or text readability.
Check image dimensions locally
Choose an image to read its width, height, aspect ratio, file size, format, orientation, and closest YouTube image workflow. The check runs in your browser and does not upload or store your image.
Drop an image here or choose a file.
JPG, PNG, GIF, WebP, and AVIF files are read locally in your browser.
Supported first-pass matches
| Asset | Dimension signal | Recommended next page |
|---|---|---|
| YouTube thumbnail | 16:9 at 3840 x 2160, 1920 x 1080, or 1280 x 720 | Open guide |
| YouTube Shorts cover | 9:16 at 1080 x 1920 | Open guide |
| YouTube profile picture | 1:1 square, at least 98 x 98, ideally 800 x 800 | Open guide |
| YouTube banner | 16:9 at 2560 x 1440 plus 1546 x 423 safe area | Open guide |
Local image privacy
This checker runs in your browser and does not upload or store your image. The file is used only to read local dimensions and show a preview on this page.
Read the privacy policyImage dimension checker FAQ
How do I check image dimensions?
Open the Image Dimension Checker, choose an image, and the tool reads its pixel width, height, aspect ratio, file size, format, orientation, and nearest YouTube image match.
Does ImageSizeKit upload my image?
No. The checker runs in your browser and ImageSizeKit does not upload or store your image.
Which YouTube image sizes can this checker match?
The first version checks YouTube thumbnails, Shorts cover frames, profile pictures, banner canvas size, banner safe-area guidance, and generic square, landscape, or portrait images.
What should I do after checking dimensions?
Open the suggested next page for the asset type, then confirm crop, safe area, text readability, and upload limits before publishing.
Related image size tools
YouTube Thumbnail Size
Check 16:9 thumbnail dimensions, file size, and upload readiness.
YouTube Shorts Thumbnail Size
Plan vertical 1080 x 1920 Shorts cover frames.
YouTube Profile Picture Size
Check square profile images and circular crop safety.
YouTube Banner Size
Plan a 2560 x 1440 channel art canvas.
YouTube Banner Safe Area
Preview the centered 1546 x 423 safe area.
Aspect Ratio Calculator
Calculate matching widths and heights before export.