Understanding the BMP Format
BMP (Bitmap) is one of the oldest image formats, dating back to early Windows. It stores images with no compression at all — every single pixel is recorded individually. This creates very large files but preserves perfect quality.
While BMP was once common, modern formats like JPG and PNG offer much better file sizes with comparable quality.
Why BMP Files Are So Large
A BMP stores 3 bytes per pixel (24-bit color). A 1920x1080 image contains over 2 million pixels, creating a file over 6MB — for a single image. The same content as JPG might be 200-500KB.
This massive size makes BMP impractical for sharing, uploading, or storing large numbers of images.
When You Might Encounter BMP Files
BMP files still appear in legacy software, old archives, screenshots from certain programs, and clipboard operations in Windows. Some industrial and medical equipment outputs BMP format.
Converting to JPG makes these files practical to store, share, and use in modern applications.
Convert Legacy Files Privately
FormatWiz converts your BMP files to JPG entirely in your browser. Old documents, screenshots, and archived images stay on your device throughout the process.
The dramatic file size reduction makes batch conversion of BMP archives especially worthwhile.