No. Both BMP and PNG are lossless, so the pixels are identical — the PNG is just smaller.

Why is PNG smaller than BMP?

PNG uses efficient lossless compression, while BMP stores pixels with little or none.

Does it keep transparency?

If the BMP includes an alpha channel, it’s preserved; most BMPs are opaque.

Convert BMP to PNG

Convert BMP bitmaps to lossless PNG — smaller files with identical pixels, all in your browser.

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What is BMP?

BMP is a legacy Windows bitmap format that stores images with minimal compression, producing large files that are awkward to share or store.

Why convert BMP to PNG?

PNG is lossless like BMP but compresses far more efficiently, so you keep every pixel while cutting the file size — and PNG opens on every modern platform.

Quality & compatibility notes

Because both formats are lossless, the PNG is a pixel-perfect copy of the BMP, just smaller. This is the best choice when you need to preserve sharp edges, text, or graphics.

How to bmp to png

Drop your .bmp files into the zone above, or browse to select them.
No options needed — PNG output is always lossless.
Press Convert all. Everything runs locally in your browser.
Download each PNG, or all of them as a ZIP.

Related converters

BMP to JPGCompress bulky bitmaps into portable JPGs.PNG to JPGShrink PNGs into compact, shareable JPGs.TIFF to PNGConvert scans and TIFFs to lossless PNG.Image ResizerResize to exact pixel dimensions or handy presets.