BMP to JPG, explained
Make a JPEG copy of a BMP photo for a form or recipient that requires JPG. Choose compression quality after previewing the bitmap; small text and flat-color drawings may work better as PNG.
Load a BMP and confirm the decoded picture.
Choose JPG quality for its photographic detail or text.
Convert and inspect the downloaded JPEG at full size.
Choose JPEG for a concrete requirement
Use this conversion when a destination asks for JPEG or a bitmap photo is inconvenient to share. Renaming .bmp to .jpg is insufficient because the bytes still describe BMP. This route performs a real decode and encode.
Photographs and diagrams behave differently
JPEG compression can suit photographic content but introduce visible changes around text and sharp outlines. If your BMP is a screenshot or technical drawing and the destination accepts PNG, compare that output first.
White replaces transparent areas
The JPEG output is opaque. Any transparency exposed by the BMP decoder is composited against your chosen background, white by default. Use a transparency-capable output if a logo must blend onto another background.
Quality is not a dimension control
The default quality is 90. Lower values can change detail and output size but keep decoded width and height. Use Advanced Settings to resize during conversion and retain the original BMP for future experiments.
Legacy input limits
Browser-native BMP decoding does not cover every possible legacy encoding. Unsupported variants fail before output. A small file can also exceed the decoded limit of 24 megapixels; file size alone is not a memory estimate.