Extract bmp alpha channel

Download and install the latest version of Filestar.
Right click on one or more Bmp file(s) on your desktop and select Convert with Filestar.
Type extract alpha channel in the search box.
Press Extract.

What is .bmp?

Name: Bitmap Image
Extension: .bmp
Format: Binary
Category: Raster Image
Developer: Microsoft
Description: A BMP file is an uncompressed raster image comprised of a rectangular grid of pixels. It contains a file header (bitmap identifier, file size, width, height, color options, and bitmap data starting point) and bitmap pixels, each with a different color.
MIME Type: image/bmp
Sample: sample.bmp
Wikipedia: .bmp on Wikipedia

Last updated October 3, 2026