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PNG Alpha Mask Viewer

Inspect transparency as black, grey and white pixels.

Tool inputs stay in your browser · optional AI search sends your query

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Good to know: Works locally in your browser with JPG, PNG and WebP. No images are sent to the server. Maximum 10 MB per file, 8 megapixels and 4096 pixels per side. Up to two images only for comparison; other tools use one. Outputs have the same pixel size unless the tool explicitly changes it. Static images only; animation and original metadata are not preserved. Keep your original files.

How to use it (step by step)

  1. 1Choose a transparent PNG or WebP.
  2. 2Create the mask: white means opaque, black means transparent, grey means partly transparent.
  3. 3Download the mask PNG for inspection. It is not the original image.

Words to know

Masking
Hiding most of a number with dots or stars, like •••• 4242, so it cannot be misused.
Resolution / pixels
A picture is made of tiny dots called pixels. 1080×1920 means 1,080 dots wide and 1,920 tall.
JPG, PNG, WebP
Picture file types. JPG is best for photos, PNG for graphics and see-through backgrounds, WebP is newer and smaller.
Alpha mask / opacity
Alpha controls how see-through a pixel is. An alpha mask shows that as black (invisible), white (solid) and grey (partly see-through).
EXIF / metadata
Hidden information stored inside a photo: camera, date and sometimes the exact place it was taken.
Data storage units
Sizes of digital files: 1 KB ≈ a short text, 1 MB ≈ a photo, 1 GB ≈ a movie. 1 GB = 1,000 MB (or 1,024 in computer counting).

More in Design & Color

Image PosterizerReduce the number of color levels in actual image pixels.Image Color ReplacerReplace matching colors in a graphic while retaining transparency.Sprite Sheet & Grid SlicerSplit any regular image grid into numbered PNG files and a ZIP.Image Difference HeatmapCompare two same-size images and export a visible difference map.Halftone Dot Image MakerTurn a photo into a printable-looking black-dot raster effect.RGB Channel SplitterExport separate grayscale red, green and blue channel images.