Extract Alpha Channel
Extract the alpha/transparency channel from a PNG as a grayscale image. Transparent areas become black, opaque become wh
How to Use Extract Alpha Channel
- Upload PNG: Select a PNG image to extract its alpha channel as a grayscale mask.
- Extract alpha: Click Extract Alpha to generate a grayscale image where black = transparent and white = opaque.
- Download mask: Preview the alpha mask and download it as a PNG for use in compositing or VFX workflows.
About Extract Alpha Channel
Extract Alpha Channel creates a grayscale image from the alpha (transparency) channel of your PNG. Transparent areas become black, opaque areas become white.
- Alpha Visualization: Converts alpha values to grayscale (0-255).
- Mask Output: Fully transparent pixels become black, opaque become white.
- Instant Preview: See the alpha mask side-by-side with the original.
- Download Result: Save the alpha mask as a PNG.
Ideal for creating alpha masks for compositing, VFX workflows, or inspecting the transparency distribution of an image.
Frequently Asked Questions
What does the extracted alpha channel look like?
It's a grayscale image where fully transparent pixels are black (0), fully opaque pixels are white (255), and semi-transparent pixels are varying shades of gray.
Can I use the extracted mask in other software?
Yes. Download the alpha mask as a PNG and use it in photo editing software, compositing tools, or VFX pipelines as a luminance mask.
Why extract the alpha channel?
Extracting the alpha channel helps visualize transparency distribution, create masks for compositing, and debug alpha-related issues in images.