Split bmp3 into grid

Download and install the latest version of Filestar.
Right click on one or more Bmp3 file(s) on your desktop and select Convert with Filestar.
Type split into grid in the search box.
Press Split.

What is .bmp3?

Name: Bitmap Image
Extension: .bmp3
Format: Binary
Category: Raster Image
Developer: Microsoft
Description: BMP3 (Bitmap 3) is a file format for storing and sharing digital images. It is a variant of the BMP (Bitmap) format, which is a commonly used image file format that is supported by many different operating systems and applications.
MIME Type: image/bmp
Sample: sample.bmp3
Wikipedia: .bmp3 on Wikipedia

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Last updated October 3, 2026