JPG to BMP Converter — Free, Online, No Upload

JPEG is the dominant format for photos on the web and in consumer devices, but it uses lossy compression — which makes it a poor input for software that expects raw, unmodified pixel data. Some older Windows applications, legacy printing systems, and embedded tools refuse JPEG entirely or produce unexpected results because of how JPEG's DCT blocks interact with their rendering pipelines.

BMP is Windows' native uncompressed image format and is accepted by virtually every piece of software that runs on Windows, regardless of age. Windows Paint, older versions of Microsoft Office, certain CNC machine controllers, and some label-printing software specifically require BMP. It's also used in some game development workflows for texture atlases when the engine doesn't support modern formats.

The trade-off is file size. A JPEG photo compressed to 500 KB can easily become a BMP of 5–10 MB or more, because BMP stores full, uncompressed pixel data. Also note that if the JPEG was already compressed, the BMP won't recover the detail that JPEG discarded — it just stores the compressed pixels without further loss. You're getting lossless storage of whatever the JPEG contained, not a restoration of original quality. Convert to BMP when a specific tool requires it; for most other uses, JPEG or PNG remain far more practical.

Typical sizes (12MP photo): JPG 2–5 MB → BMP 35–40 MB.

BMP will not bring back detail that JPG compression already removed, but it adds no further loss — handy when you need to edit the image.