# BMP to WebP encoder Convert an uncompressed BMP to lossy or lossless WebP locally in your browser. Three statically linked QIP components cover opaque photos, lossy transparency, and exact lossless pixels; the image is not uploaded.

Encoding

Opaque encoding reserves 448 MiB of Wasm memory. Declared V5 alpha is composited over the selected background; legacy BI_RGB is treated as opaque.

All three components accept at most 25,000,000 pixels and 8192 pixels on either side. Opaque mode accepts 24-bit `BI_RGB`, 32-bit `BI_RGB` BGRX, and explicitly masked V5 BGRA; declared alpha is flattened over the selected background. The alpha-preserving modes require 32-bit pixels. Opaque lossy mode is the better default for photographs, while lossless mode is intended for pixels that must round-trip exactly. Resize larger camera originals before encoding. The worker is discarded after every encode. This releases its fixed Wasm memory instead of keeping a 448 MiB, 1.1875 GiB, or 1.5 GiB instance attached to the page. ## Components - bmp-b8g8r8a8-srgb-to-webp-lossy.wasm — - bmp-b8g8r8a8-srgb-to-webp-lossy-opaque.wasm — - bmp-b8g8r8a8-srgb-to-webp-lossless.wasm — ## CLI equivalent ```bash qip run components/image/bmp/bmp-b8g8r8a8-srgb-to-webp-lossy-opaque.wasm \ -u quality=95 -u method=4 -u sharp_yuv=1 -u low_memory=1 \ -u background_color=0xffffff \ < input.bmp > output.webp qip run components/image/bmp/bmp-b8g8r8a8-srgb-to-webp-lossy.wasm \ -u quality=95 -u method=4 -u sharp_yuv=1 -u low_memory=1 \ < input.bmp > output.webp qip run components/image/bmp/bmp-b8g8r8a8-srgb-to-webp-lossless.wasm -u level=6 \ < input.bmp > output.webp ```