What is .MRB file extension?
Bitmap image file containing several different resolutions of an image; includes settings that mark each image for a specific resolution and type of display; prevents graphics from being stretched or appearing too big or small; also helps for mapping colors more accurately on different-looking displays.
MRB files can be created with Microsoft's Multiple Resolution Bitmap Compiler (MRBC) in older Microsoft Windows SDKs. They may also be created in other Microsoft C/C++ software.
MRB image files were often used when compiling help documentation using Microsoft's older help compilers (HC30.EXE, HC31.EXE, HCP.EXE, and HCW.EXE).
NOTE: Because MRB files can contain multiple raw bitmaps, they can become very large in size compared to other compressed images.
You can see a list of software programs here on www.easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.