Converting BMP to WebP dramatically shrinks uncompressed bitmap files with either lossless or lossy compression, depending on content. Lossless WebP is typically 30–60% of the PNG equivalent; lossy WebP at high quality is 5–10× smaller still.
Drag & drop image files here, or browse
Drop your BMP files here
Lossless WebP preserves exact pixels from the BMP. Lossy WebP at quality 85+ is indistinguishable from the source for photos. Alpha transparency transfers reliably. Older browsers may not support WebP, but every current one does.
WebP works in Chrome, Firefox, Edge, Safari 14+, and every modern OS. Most image editors support it.
BMP is the uncompressed Windows bitmap format from 1990. Files are huge because almost nothing is compressed, but the format is trivial to decode and supported by virtually every Windows utility, embedded system, and legacy tool. Useful as an interchange format when other options fail.
WebP is Google's 2010 image format based on the VP8 video codec. It offers lossy and lossless modes, full alpha transparency, and animation in a single container. At matched quality it's typically 25–35% smaller than JPG or PNG. Every major browser has supported it since 2020.
Lossless for UI, screenshots, icons, or flat-color art: the BMP has exact pixels and WebP can preserve them compactly. Lossy at quality 85+ for photographs where the savings are worth imperceptible quality loss.
Lossless WebP is typically 10–30× smaller than BMP. Lossy WebP at reasonable quality is 30–100× smaller.
BMP is the uncompressed Windows bitmap format from 1990. Files are huge because almost nothing is compressed, but the format is trivial to decode and supported by virtually every Windows utility, embedded system, and legacy tool. Useful as an interchange format when other options fail.
WebP is Google's 2010 image format based on the VP8 video codec. It offers lossy and lossless modes, full alpha transparency, and animation in a single container. At matched quality it's typically 25–35% smaller than JPG or PNG. Every major browser has supported it since 2020.
Yes. The converter runs entirely in your browser using WebAssembly. Your images are never uploaded, never sent to a server, and never leave your device.
There's no hard limit, but because everything runs in your browser you're bounded by available memory. Very large images (over a few hundred megapixels) can hit browser memory limits. Process in smaller batches if you run into issues.