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JPG to BMP

Convert JPG images to BMP instantly — free, private, batch supported.

No upload

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About JPG to BMP

Some older and industrial software only reads uncompressed BMP: label printers, embroidery and CNC tools, microcontroller display utilities and a handful of Windows applications. This converter writes a standard 24-bit Windows bitmap from your JPG, ready for those programs. Expect the file to grow a lot, since BMP stores every pixel raw. Conversion is done by your own browser.

How to use JPG to BMP

  1. Add the JPG photos or graphics you need as BMP.
  2. Choose BMP in the Convert to row.
  3. Pick a Background for transparency colour if the source has any transparent areas.
  4. Click Convert to BMP and download; the files will be noticeably larger than the JPGs.

What people use it for

  • Feeding an image to a label or receipt printer utility that expects BMP.
  • Loading a picture into legacy Windows software or an old Visual Basic application.
  • Preparing an image for an embedded display or a microcontroller tool chain.
  • Meeting a lab or machine-vision requirement for uncompressed input files.

Good to know

Output is a 24-bit uncompressed bitmap with the standard 54-byte header, which is what almost all software expects. Size is roughly width times height times three bytes, so a 12 MP photo becomes about 36 MB. There is no quality slider, because nothing is compressed, and BMP stores no transparency or EXIF data.

Frequently asked questions

Why did a 2 MB JPG become 30 MB?
BMP does not compress anything. It writes three bytes per pixel, so the size depends only on the dimensions, never on how detailed or simple the picture happens to be.
Does converting to BMP improve quality?
No. Detail the JPG already discarded cannot come back. BMP simply stores the decoded pixels as they are, without adding any further loss of its own.
What kind of BMP does it produce?
A 24-bit uncompressed Windows bitmap, stored bottom-up with rows padded to four bytes, the exact layout legacy applications and printer drivers expect.