Turn JPG into Raw BMP Pixel Data — Uncompressed

When to convert JPG to BMP

BMP stores raw, uncompressed pixel data, so converting JPG to BMP doesn't add any quality — it just unpacks whatever compression artifacts already exist in the JPG and writes them out pixel-by-pixel with no further loss. The appeal is exactness for downstream tools: some embedded systems, industrial imaging equipment, legacy Windows applications, and certain printer drivers expect raw bitmap input and either mishandle or flatly reject compressed formats. Because nothing is compressed, file size explodes — a JPG that's a few hundred kilobytes can become several megabytes as BMP, since every pixel's full color value is stored with no encoding efficiency at all. Standard BMP has no meaningful alpha channel support in most software, and since JPG never carried transparency to begin with, this is rarely a practical loss. There's no quality benefit to gain and a significant size cost, so this conversion only makes sense when a specific piece of software or hardware demands BMP input — never for storage, sharing, or web use, where BMP offers no advantage over keeping the JPG. If you're unsure whether your target system truly requires BMP, it almost always doesn't, and you should keep the compressed original instead.

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