About this tool
BMP is the plainest image format there is: uncompressed pixels in a simple container that practically every piece of software written in the last three decades can open. That simplicity keeps it alive in embedded systems, industrial tools, Windows utilities, and programming coursework where an easily parsed format matters more than file size.
This converter turns any common image into a standard BMP file directly in your browser. People typically need it for legacy applications that insist on .bmp input, for microcontroller and e-paper projects whose firmware reads BMP natively, or for image-processing homework where an uncompressed format makes the pixel data easy to inspect.
How to use
- Click browse or drop your image onto the page.
- The image opens in the in-browser editor, where you can crop or resize before exporting.
- Press Save and the image is re-encoded as BMP locally.
- Your .bmp file lands in the downloads folder, ready to use.
Nothing is uploaded at any point. The BMP encoding runs in your browser tab using local WebAssembly code, so the picture never touches a server.
Frequently asked questions
Why is the BMP so much larger than my original?
BMP stores pixels essentially uncompressed, so a photo that was a compact JPG can grow dramatically. That is expected and is exactly the property some legacy software and embedded devices depend on.
Does BMP keep transparency?
Standard BMP files do not carry an alpha channel, so transparent areas from PNG or WebP sources are flattened during conversion. Use PNG if transparency matters.
Which programs can open the result?
Virtually all of them. BMP has shipped with Windows since the early 1990s and is readable by every mainstream image viewer, office suite, and programming library.