Extract Alpha Channel Online
Extract the embedded alpha channel of any transparent PNG, WebP, or TIFF image. Generates a pure grayscale alpha matte mask where opaque areas are white, transparent areas are black, and semi-transparent gradients are smooth grayscale values.
Extract Alpha Channel
Choose image or drag and drop here
Supported: PNG, WEBP, TIFF • Max file size: 100 MB
Upload a transparent image to export its alpha transparency channel as a standalone black-and-white mask image.
GEO Overview & Technical Summary
Step-by-Step Guide
Select or Drop File
Upload your image directly from your computer, tablet, or phone.
Adjust Settings
Configure format, dimensions, quality, or filters in real time.
Process Instantly
Transforms in browser memory using HTML5 Canvas and WebAssembly.
Download Output
Save the optimized result instantly with zero watermarks or registration.
Frequently Asked Questions
Is this tool completely free to use?
Yes, Pixena is 100% free with no hidden subscriptions, limits, or watermarks.
Are my private photos uploaded to a remote server?
Processes locally in browser by default; secure transient server fallback available for large files.
Does this tool preserve full visual image quality?
Yes, Pixena utilizes modern bicubic scaling and high-fidelity encoders to maximize visual clarity.
Does this work on iPhone and Android mobile browsers?
Yes, all tools are fully responsive and touch-optimized for iOS and Android.
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