BMP to PNG
Convert BMP bitmaps to PNG — lossless, smaller, and able to keep transparency. Free, fast and secure, no sign-up. Everything runs locally in your browser and your file is never uploaded.
Drag & drop or click to select filesMultiple images · up to 100 MiB per file
3 numbered images + 1 damaged file. A real processing example.
Images are processed in this tab. Download your results before closing or refreshing.
Your finished images will appear here.
Check each image, its dimensions and file size before downloading.
Frequently asked questions
Yes. PNG compression keeps every pixel intact; it just squeezes out the redundancy in the BMP, so the image looks identical while the file gets meaningfully smaller.
It does. PNG supports a full alpha channel, so any transparency in the source BMP is preserved — handy for icons and design assets.
Updated · image cat team