BMP to WebP Converter
Take an old BMP and compress it into a lightweight WebP.
Add a file to begin
Drop a file here, browse from your device, or paste from the clipboard.
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Working on your device…
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Files stay on your device. Nothing is uploaded to Konvert.
Drop your file here
Accepted: .bmp,image/bmp · Max 24 MB
Results
About this tool
Uncompressed BMPs and modern WebP compression are on opposite ends of the file-size spectrum, which makes this a particularly effective conversion. Photographic BMPs can drop from tens of megabytes down to a fraction of that as WebP, with quality most people cannot distinguish from the original. The browser decodes the BMP locally, encodes it as WebP, and hands the result back — no upload required. Standard BMPs have no transparency, so the WebP output is opaque. Convert one file at a time, up to about 25MB per run.
FAQ
For photographic BMPs the drop is often huge — sometimes 90% or more.
It can, but standard BMPs are opaque, so the output stays opaque here.
No. The conversion is performed locally on your device.
All current mainstream browsers. Very old browsers may need a fallback.
More about this tool
How it works
- Pick a BMP file from your device.
- The browser decodes the bitmap and encodes it as WebP.
- Download the WebP file when the conversion completes.
Features
- Dramatic size savings — Uncompressed BMPs shrink sharply when saved as WebP.
- Web-first output — WebP is well-supported across modern browsers and CDNs.
- Opaque result — Standard BMPs carry no alpha, so the WebP stays fully opaque.
- Lossy by default — The compression tuning is chosen to keep photos looking natural.
- Local conversion — The BMP is processed entirely in your browser.
Supported formats
Input: BMP. Output: WebP.
Input
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BMP bmp
Output
-
WebP webp
Common uses
- Publishing legacy imagery — Bring BMP-era photos into a modern site without inflating page weight.
- Bulk archive compression — Cut storage costs for large BMP archives by moving to WebP.
- Mobile-friendly sharing — Send images that would otherwise be too large as raw BMP.
Limitations
- Very old browsers may not display WebP.
- WebP encoding is lossy by default.
- Files above ~25MB may need to be reduced first.
- Not intended for pixel-perfect archival of technical bitmaps.