BMP to PNG Converter
Turn a BMP into a PNG right in your browser — no upload, no waiting. Shrink a bulky BMP down dramatically with zero quality loss.
Everything runs in your browser — your image is never uploaded, sent to a server, or stored. Nothing leaves your device.
How it works
Choose your BMP and the tool re-encodes it as a PNG. Because PNG compresses the same pixels losslessly, the file gets dramatically smaller than the uncompressed BMP with no quality loss and no quality slider needed. The picture's width and height stay exactly the same — only the format changes. Your download keeps the original file name, just with a .png ending.
When to use it
Use this whenever you want to shrink a BMP without losing anything — it's the go-to move for that. If your BMP has transparency, PNG keeps it too. If it's really the dimensions you want to change, use the Image Resizer instead.
Frequently asked questions
Why is my BMP file so big?
BMP doesn't compress its pixels at all, so every pixel is stored at full size. That makes BMP files much larger than they need to be, which is why the format is almost never used on the web.
Will converting to PNG lose any quality?
No. PNG is lossless, so you get the exact same pixels as your BMP, just compressed properly. The file size drops a lot; the picture itself doesn't change.
Is my image uploaded anywhere?
No. The whole conversion happens in your browser using a canvas element. Your file never leaves your device.