Image size checker
Drop an image to read its real dimensions and weight.
Cropped in your browser · your image is never uploaded
Drop an image and read its pixel dimensions, aspect ratio and file size. Nothing is uploaded. The browser reads the file directly from disk.
How to use the image size checker
The reason to use a page rather than the file properties dialog is the comparison: knowing an image is 1440 × 810 is less useful than knowing that is 16:9 and therefore fine for a video thumbnail but wrong for an Instagram post. The checks here run against common targets so the answer is a judgement rather than a number. One thing worth understanding is the difference between pixel dimensions and print size: an image has no physical size until you choose a resolution, so 2480 × 3508 is A4 at 300 dpi and also A3 at 212 dpi and also a very large poster at 72. The DPI stored in a file is a suggestion, not a property of the pixels.
Questions
Drop it here. The browser reads it from disk and nothing is sent anywhere.
Dimensions are pixels; file size is bytes on disk. A large image can be a small file if it compresses well.
For 300 dpi, divide the pixel dimensions by 300 for inches. 2480 × 3508 is A4.
No. DPI is metadata suggesting a print size; the pixels are unchanged.
It is shown alongside the dimensions, reduced to its simplest form.