SMART IMAGE TOOLS IMAGE WORKSPACE
Check the pixels. Is that background really transparent?
Pixels are inspected and edited on your device. No image upload or AI model download.
Drag and drop a file here, or choose from your device.
Original synthetic practice image · created on your deviceJPG, PNG or WebP · up to 50 MB and 8 megapixels · still-image processing
METHOD & PRACTICAL GUIDANCE
PNG and WebP can contain transparent pixels, but an opaque image can still have either extension. Open the file and analyze its decoded pixels. Zero alpha means fully transparent; 255 means fully opaque. Counts include every pixel in the decoded still frame, including partial transparency along antialiased edges.
Inspect the alpha mask using the comparison or side-by-side view. A painted checkerboard remains white in the mask because its pixels are opaque. Real empty areas appear black. Switch the preview between light and dark backgrounds to check whether the image composites as expected. Some real transparency does not establish that the entire background is transparent.
Download the JSON report for exact counts and visible bounds, or download the grayscale mask for further editing. For a flat white background or two-tone checkerboard, try Remove Color Background. For a photograph with a varied background, use AI background removal and inspect the resulting edges.
The mask is a diagnostic image. Inspection leaves your source untouched. The tool does not identify the subject, recognize checkerboard patterns, or verify image provenance. How we document our tools
A PRACTICAL EXAMPLE
Verify whether visible empty areas have real alpha.
Finding some transparent pixels does not mean the whole background is transparent. This tool measures alpha and does not recognize subjects or checkerboard patterns.
Examples illustrate specific inputs and settings. Actual output size and appearance depend on your file and browser. Practice images are synthetic; they do not contain personal data.
GOOD TO KNOW
Yes. PNG supports transparency but does not require it. A white or checkerboard pattern can be painted into fully opaque pixels. This tool checks decoded alpha values rather than the filename or appearance.
Black means fully transparent, white means fully opaque, and gray means partial transparency. The mask is a diagnostic grayscale PNG. It does not change your source image.
It establishes whether decoded pixels contain transparency. It does not recognize checkerboard patterns or certify that every background area is transparent. An image can contain both real transparency and a painted background; inspect the mask and preview.
No. Pixel analysis and editing run in a worker on your device. No account or AI model download is required. JPG, PNG and WebP are supported up to 50 MB, 8 megapixels and 8,192 pixels per side. Animated images are inspected as a decoded still frame.