BMP to PNG Converter

BMP stores pixels raw, with essentially no compression — which is why a modest image out of Windows Paint, a scanner, or an old piece of industrial or medical software can run to tens of megabytes. PNG stores exactly the same pixels using lossless compression. The conversion is mathematically reversible: nothing at all is thrown away, the file just stops wasting space.

Add up to 15 BMP files (5MB each) and click Convert — PNG is already selected. Compare the size figures in the results list; a five-to-one or ten-to-one reduction is routine. Download each file or take the batch as a ZIP.

This is the rare conversion with no quality trade-off whatsoever, so there is no reason to keep the BMP once you have the PNG — the two are pixel-identical. It is the safest way to deal with a folder of oversized BMPs from a scanner or legacy application. The one thing to watch is the 5MB per-file cap here, which uncompressed BMPs hit surprisingly quickly; if your files exceed it, reduce the dimensions first. If the image is a photograph and the file still needs to be smaller, convert to JPG or WebP afterwards.

• BMP to JPG
• PNG to JPG
• PNG to WebP
• JPG to PNG
• JPG to WebP
• WebP to JPG
• WebP to PNG
• PNG to AVIF

Need another format? Open the full Image Converter, or try the Image Resizer and Image to Base64 tools.