Convert JPEG to BMP Online
Convert your JPEG images to BMP (Bitmap) format for maximum compatibility with legacy Windows applications and systems. BMP is an uncompressed raster format that stores exact pixel data without any quality loss. Our converter transforms your compressed JPEG files into full-quality BMP images instantly.
While BMP files are larger than JPEGs due to lack of compression, they preserve every pixel exactly as converted. This makes BMP useful when you need raw pixel data or when working with software that requires uncompressed input. Upload your JPEG and download a lossless BMP version.
About BMP Format
BMP (Bitmap Image File) was developed by Microsoft for Windows and OS/2 operating systems. It stores images as a grid of pixels with color data for each pixel, resulting in large file sizes but perfect quality. BMP supports various color depths from 1-bit monochrome to 32-bit true color with alpha transparency.
The format's simplicity makes it universally readable—virtually every image editor and viewer supports BMP without additional codecs. However, large file sizes make BMP impractical for web use or storage. Modern alternatives like PNG offer similar quality with better compression.
When to Use BMP
- Legacy software — older applications that only accept BMP input
- Windows system graphics — wallpapers, icons on older Windows versions
- Raw pixel editing — when you need uncompressed pixel data
- Hardware displays — some embedded systems require BMP format
- Print workflows — some print systems process BMP directly
BMP vs Other Formats
For most modern use cases, PNG is a better choice than BMP—it provides lossless quality with much smaller file sizes through compression. Use BMP only when specific software requirements demand it. For web images, JPEG or WebP offer dramatically smaller files with acceptable quality.
BMP's advantage is universal compatibility with even the oldest Windows software. The simple file format requires no special decoders, making it reliable for legacy applications and embedded systems that predate modern image format support.
How the Conversion Works
Converting JPEG to BMP involves decoding the compressed JPEG image and storing the resulting pixels in BMP's uncompressed row-based format. BMP files consist of a header describing dimensions and color depth, followed by raw pixel data. This straightforward structure ensures maximum compatibility with all software.
BMP File Size Considerations
BMP file size is predictable: width × height × 3 bytes for 24-bit color (plus a small header). A 1920x1080 image becomes approximately 6.2 MB as BMP. A 4K image (3840x2160) becomes about 25 MB. Plan storage accordingly when working with BMP files—they can quickly consume disk space.
Related Tools
- BMP to JPG — compress BMP for smaller size
- BMP to PNG — lossless compression alternative
- JPG to PNG — modern lossless format