BMP → PNG
Convert BMP to PNG for lossless compression.
Drop BMP files here
or click to browse — multiple files supported
Any image format accepted; outputs as PNG
Compression & Quality
EffortPNG is always lossless — effort only costs time
6/6
Transform
Resizenever upscales by default
Rotate & fliplossless either way
Privacy & Metadata
About this conversion
BMP is an old Windows format that stores pixels with no compression — supported everywhere but produces very large files.
Common questions
Are my files uploaded to a server?
No. The conversion runs entirely in your browser. Your files never leave your device.
Will converting to PNG reduce quality?
No. PNG keeps every pixel exactly as it was — there is no quality loss from the conversion itself.
Does PNG support transparent backgrounds?
Yes — PNG supports transparency — but BMP does not, so there is no transparent data to carry over. The output will have a solid background.
Also consider: If you need a smaller file and a small, usually invisible quality change is acceptable, WebP and AVIF both cut file size dramatically compared to PNG.