BMP to WebP Converter
Turn a BMP into a WebP right in your browser — no upload, no waiting. Shrink a bulky BMP down dramatically while keeping transparency.
Everything runs in your browser — your image is never uploaded, sent to a server, or stored. Nothing leaves your device.
How it works
Choose your BMP and the tool re-encodes it as a WebP using a quality slider (default 90%). Higher quality keeps more detail but makes a bigger file; lower quality shrinks the file further but looks rougher. Either way, WebP shrinks a bulky BMP dramatically. The picture's width and height stay exactly the same — only the format changes. Your download keeps the original file name, just with a .webp ending.
When to use it
Use this when you want a modern, small file from a bulky BMP without giving up transparency. It's a solid middle ground between PNG's lossless size and JPG's smaller-but-no-transparency tradeoff.
Frequently asked questions
Why is my BMP file so big?
BMP doesn't compress its pixels at all, so every pixel is stored at full size. That makes BMP files much larger than they need to be, which is why the format is almost never used on the web.
Will the output keep transparency?
Yes. WebP supports transparency, so any see-through areas in your BMP carry over to the converted file.
Is my image uploaded anywhere?
No. The whole conversion happens in your browser using a canvas element. Your file never leaves your device.