The short answer
Why use Pixel Counter?
Coverage is hard to judge by eye on a transparent cutout. A count of every visible pixel gives an exact number you can compare between two versions.
Pixel Counter counts every pixel whose alpha is above zero, which tells you how much of a transparent PNG is actually covered. A product cutout that reports 412,880 non-transparent pixels on a 1000 × 1000 canvas fills about 41% of the frame.
Semi-transparent edge pixels count as covered, even at 1% opacity, so soft shadows and feathered edges raise the number. A JPEG has no transparency at all, so it always reports width times height.
For the pixel dimensions of an image, use Size Finder or Image Viewer. For the colors in it, use Dominant Colors. Pixel Counter only answers the coverage question.
Where Pixel Counter fits
Product cutouts
Check how much of a marketplace image the product actually fills.
Cutout cleanup
Spot stray pixels a background remover left by comparing counts before and after.
Print coverage
Estimate how much of a transparent shirt design will carry ink.
Start to finish
How to use Pixel Counter
- 01Tap Choose image and pick the transparent PNG, WebP, or GIF cutout.
- 02Tap Apply changes. There is nothing to set before the count runs.
- 03Read the non-transparent pixel count in the status line, then divide it by width × height for the share covered.
What to expect from Pixel Counter
| Check | What it means here |
|---|---|
| Supported input | JPEG, PNG, WebP, GIF, BMP, SVG and browser-supported AVIF images |
| Main controls | No settings, so you choose an image and tap Apply changes |
| Output | The count of non-transparent pixels in the status line, plus a PNG copy of the image |
| Working limit | 50 MB and 50 megapixels per image |
Pixel Counter tips
- A JPEG always reports width times height, because it has no transparency.
- Edge pixels at even 1% opacity count, so soft shadows raise the total.
- 250,000 covered pixels on a 1000 × 1000 canvas means a quarter of the frame.
- Compare two cutouts of one product to see which background removal left more halo.
Pixel Counter FAQ
Something missing? Ask us.
Why does my JPEG count every pixel?
Does Pixel Counter upload my file?
Is Pixel Counter free to use?
Why did Pixel Counter fail or look wrong?
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