Convert BMP to WebP

Converting BMP to WebP is worth doing when the destination matters more than the source. BMP is built for uncompressed bitmaps, mostly a legacy Windows format. WebP is built for web images, roughly thirty percent smaller than JPG at similar quality. Which one you want depends entirely on where the image is going next.

Combines the two wins: lossless compression is available if you need it, and lossy compression if you do not, both far ahead of BMP. Suits BMPs headed for a website rather than for archival.

WebP compresses by discarding detail, so this conversion trades some fidelity for a much smaller file. At high quality settings the difference is invisible in photographs, though flat colour and sharp text can show artefacts. Keep the BMP original as your master copy.

BMP stores pixels uncompressed, which is why the files are so large. Expect a dramatic size reduction here, frequently by a factor of ten or more, with no visible change.

WebP has a lossless mode, which is the mode to use here. It beats PNG by roughly twenty to thirty percent while keeping every pixel exactly, so you get a genuinely smaller file with nothing given up. Current browsers all read it, though older desktop software may not.

BMP needs almost no decoding at all, since the pixels are stored raw. That makes it the fastest input here to read and the slowest to encode from, because there is a great deal of uncompressed data to work through.

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