Convert BMP to WebP
BMP is an uncompressed Windows bitmap that keeps full pixel detail at a large file size. Converting to WebP is a size decision: WebP reaches a comparable picture in a smaller file, which is why modern sites serve it. Worth knowing before you start: WebP is lossy, so the conversion trades some detail for a smaller file. Keep the BMP original if you may need to edit it again. The conversion runs entirely in your browser: there is no upload, no file size limit and no watermark on the result.
Drop your BMP files below and download WebP in seconds. Free, unlimited and completely private: the conversion runs inside your browser, so your files never leave your device and are never uploaded to a server.
No upload. Works with your network switched off. Check it yourself, or read what actually happens to your file.
Why convert BMP to WebP?
BMP stores pixels with little or no compression, which makes files huge but trivially simple to read. It is mostly seen in legacy Windows workflows, screenshots from older tools and some scientific software. Converting to a compressed format usually shrinks a BMP by 90 percent or more.
Google designed WebP to replace both JPG and PNG on the web, and it typically compresses 25 to 35 percent smaller at similar quality. It handles both lossy and lossless modes and supports transparency. Support is excellent in browsers but still patchy in older desktop software.
BMP vs WebP at a glance
| BMP | WebP | |
|---|---|---|
| Full name | Bitmap image | WebP image |
| Compression | Uncompressed | Lossy or lossless |
| Transparency | No | Yes |
| Best for | Legacy Windows software and raw pixel data | Modern websites and apps |
What changes when you convert BMP to WebP
| What happens | |
|---|---|
| Image quality | Reduced, by however much you choose. WebP is lossy; the quality control above sets the trade. Keep the BMP original if you may need to edit it again. |
| Transparency | BMP has no alpha channel, so there is no transparency to lose. |
| EXIF and GPS | Removed. The conversion goes through a pixel buffer, so camera data and location are not carried into the WebP file. |
| Colour profile | Not carried across. The image is handled in sRGB, which is right for the web and wrong for colour-managed print work. |
| Animation | Not applicable. BMP files here are single images. |
| File size | Smaller in almost every case, which is the reason for the conversion. How much smaller depends on the picture, so no figure is quoted here. |
How to convert BMP to WebP
- Drop one or more BMP files into the box above, or click to browse.
- ImageConvert converts each file to WebP right on your device.
- Download a single file, or grab everything at once as a zip.
Frequently asked questions
What is a BMP file?
BMP is an uncompressed Windows bitmap that keeps full pixel detail at a large file size.
What is a WebP file?
WebP is a modern format from Google that compresses smaller than JPG and PNG while keeping quality.
Is it free to convert BMP to WebP?
Yes. There are no limits, no watermarks and no account needed. Convert as many BMP files as you like.
Are my files private?
Completely. Your BMP files never leave your browser and are never uploaded to a server, so your images stay on your device.