Browser-based image inspector

Image Size Checker

Check image dimensions, resolution, file size, megapixels and aspect ratio instantly.

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Choose images to inspect

JPG, PNG, WebP, HEIC and other browser-supported images

Understand image size and resolution

Pixel dimensions determine how much detail an image contains. File size in KB or MB depends on format, quality and image complexity. Megapixels are calculated by multiplying width by height.

What counts as a large image?

A 4000 × 3000 image is 12 megapixels. It is useful for print but often much larger than needed for websites, forms and email. Use the image resizer or image size reducer when the dimensions or file size are too high.

Practical guide

About this image size checker

Settings, common uses and limitations before you process a file.

The image size checker reads width, height, file size, megapixels, aspect ratio and an estimated print size. It helps confirm whether a photo meets a website, visa, form or printing requirement before upload.

Pixel dimensions and file size are different measurements. A 3000 × 2000 image can have many different KB values depending on format and compression, while DPI metadata mainly affects intended print size rather than screen detail.

Common uses

Check whether an image meets a pixel requirement
Confirm a file is below an upload-size limit
Compare several photos in one report
Estimate print dimensions at 300 DPI

Better results

Check both pixel dimensions and KB when a form lists both
Use megapixels to compare total image resolution
Verify aspect ratio before cropping
Export the CSV when reviewing many files

Important limitations

Estimated print size depends on the chosen DPI assumption
Some metadata may be unavailable in browser-readable files
File dimensions do not prove that an image is visually sharp