Convert WebP to BMP
A surprising amount of software still speaks BMP and only BMP: legacy Windows applications, embedded devices and display controllers, some lab and industrial equipment, and teaching material where students parse image bytes directly. When one of those meets a WebP downloaded from the web, a converter is the only way through.
Drop your WebP files below and download BMP 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 WebP to BMP?
Expect the file to balloon. WebP is one of the more efficient formats on the web and BMP stores pixels essentially raw, so a few hundred kilobytes of WebP routinely becomes many megabytes of BMP. That is the format doing exactly what it is designed to do.
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 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.
Note that BMP does not support transparency, so any transparent areas in your WebP files will be filled with a solid background after conversion.
What this converter does to your WebP file
The WebP is decoded and written as an uncompressed 24 bit BMP with bottom-up rows, the layout legacy Windows tools expect. Since 24 bit BMP carries no alpha channel, any transparency in the WebP is flattened onto a white background first. Every pixel is stored as three raw bytes, which is why the output is so much larger than the input.
WebP vs BMP at a glance
| WebP | BMP | |
|---|---|---|
| Full name | WebP image | Bitmap image |
| Compression | Lossy or lossless | Uncompressed |
| Transparency | Yes | No |
| Best for | Modern websites and apps | Legacy Windows software and raw pixel data |
What changes when you convert WebP to BMP
| What happens | |
|---|---|
| Image quality | Unchanged from here on. BMP is lossless, so it preserves exactly the pixels decoded from the WebP file. It cannot restore what the WebP encoder already discarded. |
| Transparency | Lost. BMP cannot store an alpha channel, so transparent areas are filled with solid white. |
| EXIF and GPS | Removed. The conversion goes through a pixel buffer, so camera data and location are not carried into the BMP 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 preserved. An animated WebP produces a single still frame. |
| File size | Much larger. A 24 bit BMP costs three bytes per pixel regardless of content, so the file size is fixed by the dimensions alone. |
How to convert WebP to BMP
- Drop one or more WebP files into the box above, or click to browse.
- ImageConvert converts each file to BMP right on your device.
- Download a single file, or grab everything at once as a zip.
Frequently asked questions
What bit depth is the BMP?
24 bit, three bytes per pixel, uncompressed, written bottom-up. That is the most widely readable BMP variant and is what legacy Windows software generally expects.
Why did my transparent background turn white?
A 24 bit BMP has no alpha channel, so transparency cannot be stored. Transparent areas are flattened onto a white background during conversion.
What is a WebP file?
WebP is a modern format from Google that compresses smaller than JPG and PNG while keeping quality.
What is a BMP file?
BMP is an uncompressed Windows bitmap that keeps full pixel detail at a large file size.
Is it free to convert WebP to BMP?
Yes. There are no limits, no watermarks and no account needed. Convert as many WebP files as you like.
Are my files private?
Completely. Your WebP files never leave your browser and are never uploaded to a server, so your images stay on your device.