Why convert BMP to JPG?
BMP is an old Windows format that usually stores every pixel without compression. A standard 24-bit bitmap at 1920 × 1080 is around 6 MB no matter what is in it. JPG compresses the same image, often to a few hundred kilobytes, which makes it practical for email, websites and upload forms that reject BMP.
BMP files often come from older scanners, Paint, screenshots from legacy software and industrial or medical equipment exports.
How to convert BMP to JPG
Upload the BMP and choose a quality. The default of 90 percent keeps the image looking the same. For photos you can go to 75 to 85 percent for a smaller file. The original and converted sizes appear side by side so you can see the saving.
If the bitmap has transparency, which is rare, the transparent areas become white, because JPG has no transparency.
JPG or PNG for bitmaps?
JPG is ideal for photos and scans of photos. For screenshots, diagrams and images with text or flat colors, PNG keeps edges perfectly sharp and is still far smaller than BMP. Convert a sample both ways and compare if you are unsure.
Palette bitmaps and batch conversion
Some BMP files use a limited palette of 16 or 256 colors, typical of old software and icons. They are converted to full color before saving, so they look the same. Their flat areas suit PNG better than JPG, so if the JPG shows speckles around edges, use the Image Compressor with PNG output instead.
To convert several bitmaps at once, add up to 20 to the Bulk Image Compressor and choose JPG as the output format.