PNG to BMP converter
Convert PNG to BMP in your browser. Produces an uncompressed bitmap — much larger, and only worth doing when something demands it.
Drop files here
or
Accepts .png · Up to 20 files at a time · up to 80 MB each "Upload" and "download" here mean your browser reading a file from this device and writing one back to it. Nothing is sent to a server — open your browser's network panel and watch: no request carries your file.
FAQ
Why would anyone convert to BMP?
Because some software cannot read anything else — older Windows tools, scientific and industrial instruments, microcontroller display code, and some firmware pipelines that consume raw pixel data.
What happens to transparency?
It is filled with white. The BMP written here has no alpha channel, so a transparent background becomes opaque.
Is quality lost?
No. Both formats store exact pixels, so the image is identical. Only the file size changes, upward and substantially.
How much larger will the file be?
Often many times. PNG compresses losslessly and BMP does not compress at all, so the increase depends entirely on how compressible the image was.
Is there a better option?
For nearly every purpose, yes — keep the PNG. Convert to BMP only when a specific tool refuses everything else.
Is it really free?
Yes — every conversion on this site, with no account, no watermark and no daily cap. The work happens on your own device, so there is no server bill for us to pass on to you.
Do I need to install anything?
No. It runs in any modern browser, on Windows, macOS, Linux, Android and iOS. There is nothing to download and nothing to sign up for, and once the page has loaded it keeps working with the network switched off.