Image Dimension Checker
Check exact pixel size, megapixels, aspect ratio and file details.
Drop any image to see its exact width and height in pixels, megapixel count, simplified aspect ratio, detected format and file size — parsed locally from the file's own header bytes.
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How it works
- Drop an image file.
- The header is parsed in your browser — nothing is uploaded.
- Read the dimensions, aspect ratio, megapixels and format.
Frequently asked questions
Why do dimensions matter more than DPI?
Pixels are the real content of an image; DPI is just a note about how densely to print them. A 4000-pixel-wide image can print 13 inches wide at 300 DPI regardless of what its DPI label says.
What size artwork should I supply for a custom patch?
Any clear image works — patches are stitched from a digitized file, not printed from your image. Around 1000 pixels on the long side is comfortable; the key is that text and details are legible.