Convert BMP to PNG without uploading your file

Need a smaller version of a BMP without losing any quality? Convert to PNG in your browser.

The conversion runs entirely in your browser. The file never leaves your computer. No signup, no upload, no tracking.

PNG uses lossless compression, so every pixel stays exactly as it was in the BMP, but the file is typically 3 to 10 times smaller. If the BMP has transparency, PNG preserves it.

When to convert BMP to PNG

PNG is the best choice when you need to reduce file size without any quality loss. Unlike JPG, PNG preserves every pixel exactly and supports transparency. The files are larger than JPG but smaller than BMP. Use PNG when the image contains text, sharp edges, or transparency that JPG compression would damage.