Alpha & Transparency Checker
Switch backgrounds and inspect transparent, translucent, and opaque pixels.
Files and settings
You can also drop or paste images. Pasted images may not retain the original file metadata.
File contents and names are not stored or uploaded.
Up to about 134.2 MB and 70 MP per image, 268.4 MB of input in total, and 100.7 MB of output. Devices with limited memory may require smaller images.
Result
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Purpose and use
Inspect logo and cutout edges against white, black, or a custom background.
Example
Three pixels with alpha values of 0, 128, and 255 count as one transparent, one translucent, and one opaque pixel.
Interpreting the result
In alpha view, black is transparent, white is opaque, and gray is translucent. Percentages use the image’s total pixel count.
Limits and caveats
JPEG normally has no alpha, so every pixel is opaque. Changing the preview background does not alter the source.
Related workflow
Use Texture Channel Pack & Unpack to work with alpha as a separate channel map.
Frequently asked questions
Will this change the original file?
No. Downloads are separate files. Closing the page discards the loaded content and results.