Sample Files
Details
BMP
Bitmap Image File
About
What is .BMP?
.bmp is an uncompressed (or minimally compressed) raster image format that stores pixel data in a straightforward, device-independent structure. It supports various bit depths and color modes and is commonly used in Windows environments and low-level imaging applications.
History
Origin of BMP
The (Bitmap) format, also known as the Device-Independent Bitmap (DIB) format, was developed by Microsoft in the early days of Windows. It served as the standard raster graphics format for storing images used by the operating system, applications, and graphical user interfaces. BMP files are structured with a simple header followed by raw pixel data, enabling fast loading and predictable rendering. While large in file size due to minimal or no compression, BMP became a foundational format in early PC graphics and remains supported for compatibility and low-level imaging tasks.
Benefits
Simple and widely supported image structure
Fast to decode due to uncompressed pixel data
Ideal for debugging, pixel analysis, and raw image handling
Supports multiple color depths including monochrome, 8-bit, 16-bit, 24-bit, and 32-bit
Great for preserving exact pixel information during processing
Usage
Open `.bmp` using any image viewer or editor including MS Paint, Photoshop, GIMP, and many others
Use BMP for testing pixel operations or debugging image pipelines
Convert BMP to PNG or JPG for optimized web usage
Edit BMP when exact, uncompressed pixel data is required
Use Cases
Common Use Cases
Here are the use cases for this file extension
System-Level Graphics
Used in early versions of Windows for icons, wallpapers, and UI graphics.
Image Processing
BMP provides raw pixel data, making it suitable for experimentation and algorithms.
Legacy Software Compatibility
Many older applications require BMP assets due to simplicity and OS-level support.
Compatibility
Supported By
This extension is compatible with the following platforms.
Windows (native support)
macOS (Preview + editors)
Linux (GIMP, ImageMagick)
Android (image viewers & apps)
iOS (limited, with apps)
Web Browsers (partial, may require conversion)
More Details
Technical Specs
Here are some technical details about this extension
File Extension
.bmp
MIME Type
image/bmp
Compression
Typically none, optional RLE for 4-bit and 8-bit bitmaps
Color Depth
1, 4, 8, 16, 24, or 32 bits per pixel
Alpha Support
Supported in 32-bit BMP formats
Metadata Support
Limited; mostly header-based information
Typical Use
Raw image storage, system graphics, pixel-perfect editing
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Got Questions?
Get answers to common questions
BMP stores raw pixel data with little or no compression, resulting in significantly larger files compared to formats like PNG or JPEG.
Yes, but mainly in system-level workflows, legacy software, and contexts where uncompressed pixel accuracy is important. Other formats are preferred for web and general use.
Some BMP variants support 32-bit images with alpha channels, but many older programs do not fully utilize this feature.