Convert BMP to PNG Online Free
Convert old-style BMP bitmaps into modern PNG files. BMP stores every pixel uncompressed, which makes files enormous; PNG keeps exactly the same quality with lossless compression, so you get a much smaller file that opens everywhere.
Your files never leave your device. All processing happens locally in your browser.
Drag & drop your image here
or click to browse
Files never leave your device
Up to 50MB per file
Why use this tool
Much Smaller, Same Quality
PNG is lossless like BMP but compressed, so files are typically a fraction of the size with no pixel-level difference at all.
Web & App Friendly
Many browsers and apps don't display BMP well. PNG is supported everywhere and is a standard web format.
100% Private
Files are processed entirely in your browser using the Canvas and WebAssembly APIs. Nothing is ever uploaded to a server.
Free Forever
No account, no watermark, no daily limits. Every tool on PixelResize is free to use as often as you like.
How to bmp to png
- 1
Drop a .bmp file into the upload area (or click to browse).
- 2
It's decoded and re-encoded as a PNG locally.
- 3
Preview the converted image.
- 4
Click Download to save your PNG.
Frequently asked questions
Related tools & sizes
BMP to PNG: Shrink Bitmaps Without Losing a Single Pixel
BMP stores every pixel uncompressed, so files balloon fast. PNG reproduces the exact same image losslessly at a fraction of the size — here's why and how.