Why convert PNG to BMP
PNG is the usual format for logos, icons, screenshots and graphics. BMP is much older, but plenty of tools still depend on it: legacy Windows software, embroidery and laser engraving programs, thermal and label printers, LED displays, some CNC and sign-making machines, firmware splash screens and hobby electronics projects that draw images on small screens.
These programs often refuse PNG outright. If you designed a logo or a label as PNG and the machine asks for BMP, converting it here is the quickest fix.
Transparency becomes white
BMP files are saved in 24-bit color, which doesn't keep transparency. Any transparent area in your PNG, such as the background around a logo or an icon, is filled with white in the BMP. For printing and for most machines, white is exactly what you want, since it usually means “no ink” or “no stitch”.
If you need a different background color, open the PNG in “Remove white background”, which can replace the background with another color, and then convert the result to BMP.
File size and quality
BMP is stored without compression, so the file will be noticeably bigger than the PNG. That's expected and doesn't affect quality: the colors and the sharp edges of your graphic are kept as they are, because neither PNG nor 24-bit BMP throws away detail the way JPG does.
Some devices have strict size limits in pixels. If yours does, use “Resize image” first to set the exact dimensions, then convert. For machines that only accept black and white, “Black and white image” can prepare the graphic before you save it as BMP.
Done in your browser
Your PNG files are converted on your own device and never uploaded, which matters if you're working with client logos or unreleased designs. There's no sign-up, no watermark and no limit. Convert a whole set of icons or labels and download them in one ZIP.
Typical examples
A shop wants its PNG logo printed at the top of receipts, but the cash register software only accepts BMP. An embroidery business receives a design as PNG and the machine's program lists only bitmap files. A maker building a weather station with a small color screen needs the icons as BMP so the display library can read them from an SD card. A technician updating the boot logo of a device follows instructions that require a BMP file of a given size.
Before converting, check whether the device needs a specific width and height or only black and white. Prepare the graphic with “Resize image” or “Black and white image” first, then convert it here. The original PNG stays untouched, so you can keep using it on the web and in documents.