Website Image Tools

Image Dimension Checker

See an image's exact width, height, aspect ratio, file size and type before you upload it to your website.

Free & instant No signup How to use FAQ

Upload an Image

This file is read entirely in your browser - it is never uploaded to any server.

Not sure what to enter?

Choose an image to see its exact pixel dimensions, aspect ratio, file size and file type.

How do I check an image's dimensions?

Open the image in this checker: it reads the file in your browser and shows the width and height in pixels, the aspect ratio, the file size and the format. That tells you straight away whether an image is big enough - or far too big - for where you want to use it.

How to check image size

Choose an image file.
Read its width, height and aspect ratio.
Check the file size and type.
Resize or compress it if it does not fit what you need.

Related checks

To change the dimensions, use the Image Resizer.
To check your page's social share image, use the Open Graph Checker.

Many platforms reject images that are too small or the wrong shape - for example Open Graph share images should be 1200 x 630. Use the Image Resizer to fix the size, and the Open Graph Checker to see how your page looks when shared.