DIB File

What are DIB files and how to open them

Are you having problems opening a DIB file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your DIB files.

What is a DIB file?

A .DIB file is a Device-Independent Bitmap Image file.

Device-Independent Bitmap (DIB) files store raster images in a format designed to be independent of any particular display device. Microsoft developed the DIB format to allow image data - pixels, color tables, dimensions, and compression settings - to be saved so that any Windows- or OS/2-based device or software can render the image the same way. These files are useful for exchanging or storing bitmap graphics where consistency across devices is essential.

A program that can create DIB content is the Windows GDI (Graphics Device Interface) API, which builds DIB data structures in memory or writes them into files (often with .DIB or .BMP extensions). After creation, software that opens these files reads the header to interpret color depth, size, and compression, then decodes the pixel data using the specified color table or palette. Most DIB files use no compression; some use simple run-length encoding for 4- or 8-bit images. The format supports color depths including 1, 4, 8, 16, 24, or 32 bits per pixel.

Internally a DIB begins with a DIB header (such as BITMAPINFOHEADER or one of its later versions) that defines image width, height, bit count, compression method, and optional color palette. When stored in a full BMP file, this is preceded by a BITMAPFILEHEADER (14 bytes) that starts with the two ASCII bytes "BM" (0x42 0x4D), followed by file-size and an offset to where pixel data starts. If height is positive the image is bottom-up; if negative it is top-down.

How to open DIB files

We have identified three DIB openers that are compatible with this specific type of DIB file.

Programs that open Device-Independent Bitmap Image files

Last updated: January 22, 2025

Various apps that use files with this extension

These apps are known to open certain types of DIB files. Remember, different programs may use DIB files for different purposes, so you may need to try out a few of them to be able to open your specific file.

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File.org helps thousands of users every day, and we would love to hear from you if you have additional information about DIB file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.