Convert BMP to PNG

Converting BMP to PNG is worth doing when the destination matters more than the source. BMP is built for uncompressed bitmaps, mostly a legacy Windows format. PNG is built for screenshots, logos and anything needing sharp edges or transparency. Which one you want depends entirely on where the image is going next.

PNG is the honest destination for a BMP, since both are lossless. You keep every pixel exactly and still typically save eighty percent or more, because PNG actually compresses where BMP does not. This is the right choice for screenshots and graphics.

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.

PNG is the natural destination from another lossless format. Every pixel survives exactly, and because PNG actually compresses where formats like BMP do not, the file usually shrinks considerably at the same time. This is the conversion with no downside.

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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