Batch converts BMPs into PNGs while creating transparency. TransparentPNG can be used as a BMP to PNG conversion tool that batch converts BMPs into PNGs while creating transparency on the fly by zeroing out Alpha values for White / Magenta pixels without effecting existing RGB values.
TransparentPNG Features:
1. simple and small
2. easy to use
3. no installation required

Requirements:
* NET Framework

The license of this software is Free, you can free download and free use this image processing software.