Convert BMP to PNG Online Free
PNG is the natural replacement for BMP: both are lossless, but PNG compresses properly, so you keep every pixel exactly while the file gets much smaller. It is also supported by browsers and modern software that often refuse BMP.
The converter here is preset to PNG output — drop in your BMP files and convert the batch at once.
Your file never leaves your browser. All processing happens on your device. Nothing is uploaded to any server.
What you can use it for
- Archiving legacy BMP images without losing any pixel data
- Making old Windows bitmaps display on the web
- Reducing storage while keeping lossless quality
Other conversions
Need a different format, a quality slider or batch conversion? Use the image converter.
Frequently asked questions
Yes. PNG compression is completely lossless, so the converted image is pixel-identical to the BMP — just stored far more efficiently.
It varies with content. Screenshots and flat-colour graphics often shrink by 80–95%; dense photographic images compress less.
No — the conversion happens locally in your browser.
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Every category runs free in your browser — nothing is uploaded.