How to convert BMP to PNG
- Drag your BMP files into the box above or click “Choose files” (folders and pasting from the clipboard work too).
- PNG is preselected as the output format; adjust quality, size and target file size if you like.
- Press “Start converting”; files are converted in your browser, in parallel.
- Download the files one by one or grab them all as a ZIP.
Why convert BMP to PNG?
PNG is lossless: it does not lose quality on every save and it keeps transparency. It suits logos, screenshots and images you plan to edit later.
BMP files are uncompressed, so converting usually shrinks them dramatically.
BMP vs PNG
| BMP | PNG | |
|---|---|---|
| File extension | .bmp | .png |
| Compression | Uncompressed | Lossless |
| Transparency | No | Yes |
| Animation | No | No |
| Typical file size | Very large | Large (for photos) |
| Support | Windows and most software | Everywhere |
| Best for | compatibility with legacy software, uncompressed raw pixels | logos, screenshots, icons, graphics with transparent backgrounds |
BMP is the native Windows bitmap format and usually uses no compression. PNG is a lossless format with full transparency (an alpha channel). File sizes get large for photographs, and animation support is not widespread.
Tips for the best results
- To shrink the file further tick “Best compression”; it is slightly slower but still lossless.
- For the web, limiting the width to 1600 pixels cuts file size a lot while keeping visual quality (Resize section).
- Metadata such as GPS location and camera details (EXIF) is always removed from the output.
Privacy and security
Conversion runs entirely in your browser (using WebAssembly); your images are never uploaded to our server and never leave your device. The server only receives anonymous counters that contain no file names or content (source/target format, size, duration). Metadata such as location and camera details is always stripped from the output.