Check Image Dimensions
Upload forms, print shops and social networks all have size requirements. Drop an image here to see its exact pixel dimensions, aspect ratio and megapixels.
- Never uploaded
- Instant, no sign-up
- Works offline
About this tool
It also tells you whether the image is large enough for common sizes such as Instagram posts, Full HD and 4K, and whether it would need cropping.
How it works
- 1
Add an image (or try the sample).
- 2
The report appears instantly.
- 3
Copy the values you need — nothing is uploaded or changed.
Features
- Exact pixelsTrue width and height, even for very large files.
- Aspect ratioShown in simplest form, like 16:9 or 4:3.
- Fit checkCompared against popular social and screen sizes.
- Private by designEverything runs on your device. No uploads, no account, no watermark, and EXIF/GPS data is stripped from the result.
Supported formats
Input: JPG, PNG, WebP, GIF, BMP, SVG, AVIF, plus TIFF/HEIC where your browser can decode them. Nothing is changed or downloaded — it's a read-only check.
Frequently asked questions
What's the difference between dimensions and file size?
Dimensions are the pixel width and height; file size is how many bytes the file uses. A large image can have a small file if it's well compressed.
How many megapixels do I need to print?
About 2 MP for a 6×4 inch print at 300 DPI, 8 MP for A4.
Does this upload my image?
No, the dimensions are read in your browser.
Are my images uploaded to a server?
No. Files are decoded, processed and re-encoded by your browser using the canvas API and Web Workers. Nothing is sent to any server, and there is no account or storage. Closing the tab discards everything.
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Need more than one tool?
The full editor combines cropping, adjustments, filters, text, shapes and layers in one place.