Check Transparency
Verify if your PNG image has transparency. Analyze the alpha channel, count transparent pixels, and see exactly where transparency exists.
or browse filesdrop an image here or paste
Verify if your PNG image has transparency. Analyze the alpha channel, count transparent pixels, and see exactly where transparency exists.
or browse filesdrop an image here or paste
Drop any image on this page and the verdict appears in a second: whether the file contains transparency, how much, and where. The alpha channel of every single pixel is examined at full resolution - not just the file header - so the answer distinguishes a PNG that genuinely uses transparency from one that merely could, and counts exactly how many pixels are fully transparent, semi-transparent and opaque. Everything runs in your browser; the image is never uploaded.
The image displays over a strong checkerboard, the universal signal for transparent areas, and the shared zoom lets you inspect any spot down to the pixel - mouse wheel or pinch to zoom, drag to pan, double click for 100%. For transparency that is hard to spot by eye - a stray semi-transparent halo around a cutout, a single missed corner, hairline anti-aliasing residue - the Highlight toggle repaints every non-opaque pixel magenta over a dimmed image, with stronger color where transparency is deeper. What looked clean often is not.
Not every format can hold transparency. PNG, WebP, AVIF and GIF support it; JPEG and BMP structurally cannot - every JPEG is opaque by definition, no matter what it shows. The verdict spells this out: a JPG reports "cannot store an alpha channel", while an opaque PNG reports that the format supports transparency but this particular image does not use it. That difference is exactly what matters when an upload form, print shop or marketplace rejects a file over its background.
A logo that should have a clear background but shows 0% transparency needs its background removed - and one that has transparency but too much empty space around it can be tightened with the transparent area trimmer. The opposite case, transparency you want gone, is one click in the fill transparency tool, which paints a solid color behind the image. And for the full numbers behind a file beyond its alpha - dimensions, size, megapixels - there is the image size finder.
Load it here. The verdict card answers immediately, the checkerboard shows through wherever the image is transparent, and the pixel counts tell you exactly how much of the image is transparent versus opaque.
No. The JPEG format has no alpha channel, so every JPG is fully opaque. If you need transparency, the image has to be saved as PNG, WebP or AVIF - converting a JPG does not add transparency by itself, it only enables the format to carry it.
Fully transparent pixels (alpha 0) are invisible. Semi-transparent pixels (alpha between 1 and 254) blend with whatever is behind them - typically the soft edges of a cutout. The tool counts both separately, since a file with only semi-transparent edge pixels behaves differently from one with a fully clear background.
PNG supports transparency but does not require it. Screenshots, photos and exports flattened onto a background are commonly saved as fully opaque PNGs. The format row confirms the file could carry transparency; the counts show it currently does not.
No. The pixels are analyzed entirely in your browser on your device, and nothing is transmitted or stored.