Turn BMP images into WebP. It is converted in your browser, so the file never leaves your device.
Drop BMP files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · other file types work too0 bytes uploaded, ever
Drop BMP files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.
Press Convert. Open Options first if you want to change the defaults. The work happens in this tab.
Save the WebP, or download everything as one ZIP if you converted several files.
The BMP to WebP converter is part of this page and runs inside your browser. Your images are never sent to ToAny or to anyone else.
Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.
No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.
BMP files are uncompressed, so they are many times larger than they need to be. WebP is smaller than JPG or PNG at similar quality and keeps transparency. BMP is at home in legacy Windows software and embedded devices; WebP is the usual choice for images on websites.
The defaults suit most files. Under Options you can set the quality, aim for a target file size and resize the result.
The WebP encoder is a WebAssembly module that downloads the first time you convert to WebP and is cached afterwards.
BMP is the plain Windows bitmap: pixels written out with little or no compression. The files are enormous compared with PNG or JPG, but the format is so simple that old software, printers and microcontroller displays still ask for it.
Opens in Windows, macOS and most image apps; too large for the web
BMP converterWebP is Google's image format for the web. It is typically a quarter to a third smaller than JPG or PNG at similar quality and supports both transparency and animation. Browsers handle it well; older editors, printers' portals and some messaging apps do not.
Opens in All current browsers; many older desktop apps and upload forms do not accept it
WebP converter| BMPBitmap image | WEBPWebP image | |
|---|---|---|
| Stands for | Bitmap | WebP |
| Type | Raster image | Raster image |
| Compression | Usually none | Lossy or lossless |
| Transparency | Rarely (32-bit variants only) | Yes |
| Animation | No | Yes |
| Introduced | The late 1980s, by Microsoft | 2010, by Google |
| Opens in | Windows, macOS and most image apps; too large for the web | All current browsers; many older desktop apps and upload forms do not accept it |
| Best for | Legacy Windows software and embedded devices | Images on websites |
| File extension | .bmp, .dib | .webp |
No. The BMP to WebP conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
A little: ToAny writes WebP in its lossy mode, so a small amount of detail is traded for a much smaller file. At the default setting the difference is hard to notice. You can raise the quality under Options; there is no lossless setting.
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the BMP file, press Convert and save the WebP. There is nothing to install.
Pictures of up to 120 megapixels are accepted (for example 12,000 by 10,000 pixels); a larger one is refused with a message. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.