drag & drop, click, or paste from clipboard
Drop to add
drag & drop, click, or paste from clipboard
BMP is not a format you choose for its merits. It is a format you are forced to use because a specific piece of software — an older Windows application, an industrial machine controller, an embedded system, a legacy kiosk — refuses to open anything else. Enhydra RPO handles the conversion from any supported source format to BMP so you are not stuck manually resaving files one at a time in Paint.
The output is uncompressed 24-bit BMP: no compression, no color palette limits (unlike GIF), full RGB fidelity from the source. The trade-off is file size — a BMP is typically 3–20× larger than the equivalent JPG and larger than PNG for the same image. Transparency from sources like PNG or WebP is flattened to a solid background on conversion, because standard BMP does not carry an alpha channel.
Most image software dropped BMP-only requirements decades ago, but a few niches still enforce it:
If none of these describe your situation, you probably do not need BMP — JPG, PNG, or WebP will serve you better.
Uncompressed 24-bit BMP stores three bytes per pixel with no compression applied. The math is straightforward: a 1920×1080 image is exactly 5,760 bytes × 1,080 rows = 6.2 MB as BMP, regardless of content. A JPG of the same image might be 400 KB; a PNG might be 1.5 MB.
For batch conversions of large images, the output ZIP can be substantial. Check that your disk has room before converting a large batch of high-resolution sources.
Regarding transparency: BMP does not support an alpha channel in its standard form. If your source is a PNG or WebP with a transparent background, that transparency is flattened to a solid color — white by default — on conversion to BMP. If you need the background to be black instead, use the background-color option in the tool settings before running the batch.
BMP stores raw, uncompressed pixel data: three bytes per pixel, every pixel, no exceptions. PNG uses lossless compression that can reduce that by 60–80%. The BMP size is the uncompressed baseline; the PNG was smaller because it was compressed.
Transparency is flattened to a solid color — white by default. Standard BMP does not have an alpha channel, so there is no way to preserve transparency in the output.
Yes. RAW formats (CR2, CR3, NEF, ARW, DNG, RAF, ORF, RW2) are developed first, then written as uncompressed 24-bit BMP. The output will be very large.
BMP technically supports 1, 4, 8, 16, 24, and 32-bit variants. Enhydra RPO outputs standard 24-bit BMP, which is what nearly all software that requires BMP expects.