Check image dimensions, resolution, file size, megapixels and aspect ratio instantly.
JPG, PNG, WebP, HEIC and other browser-supported images
| Image | Dimensions | File size | Megapixels | Ratio | Print at 300 DPI |
|---|
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.
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.
Settings, real-world decisions, release checks and limitations.
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.
| Setting or choice | Choose it when | Trade-off |
|---|---|---|
| File size | Use to confirm KB/MB upload limits | Does not describe visual dimensions |
| Pixel dimensions | Use to confirm width × height requirements | Large dimensions do not guarantee sharp detail |
| Aspect ratio | Use to detect shape such as 4:3 or 1:1 | Cropping is required to change composition |
| Print estimate | Use as a planning estimate at a chosen DPI | Actual print quality depends on content and printer |
Select the exact image you plan to submit.
Compare file size, dimensions and format with the destination rules.
Check aspect ratio before cropping or resizing.
Export the CSV only when you need a record for multiple files.
Check whether it means bytes, pixels or both.
Print size changes with the chosen DPI and printer settings.
Convert it to JPG or PNG first, then inspect the converted copy.
File size is measured in bytes; resolution usually refers to pixel dimensions or print density.
Width multiplied by height, divided by 1,000,000.
No. The tool reads properties and displays them.
The current checker focuses on file size, format, dimensions, megapixels, ratio and print estimates.
300 DPI is a common high-quality reference, but acceptable DPI depends on viewing distance and content.