Convert BMP to PNG — Free, 100% Local
BMP and PNG are both lossless formats — the difference is that BMP barely compresses at all while PNG uses efficient lossless compression. So converting BMP to PNG shrinks the file to a fraction of its original size with absolutely no change in quality, and the effect is most dramatic for screenshots and UI graphics with large flat-color areas.
It's also the best way to modernize old BMP assets: modern software, websites and upload forms support PNG far better than BMP, and unlike converting to JPG it introduces no compression artifacts, so fine text and sharp lines survive intact.
Upload BMP Image
Drag and drop an image here, or click to select
Supports JPG, PNG, WebP, BMP, GIF
Output format: PNG. Need another format? Use the full converter.
Result
Upload an image and it will be converted to PNG instantly, with a before/after size comparison.
Frequently Asked Questions
Will my images be uploaded?
No. Conversion runs entirely in your browser using the Canvas API — 100% local processing. Your images never leave your device.
Does converting BMP to PNG lose quality?
No. PNG is lossless just like BMP, so every pixel is preserved exactly and no compression artifacts are introduced.
If both are lossless, why is the PNG so much smaller?
BMP is essentially uncompressed while PNG uses an efficient lossless compression algorithm. Screenshots and UI graphics with flat-color areas often drop below a tenth of the original size at identical quality.
Should I choose PNG or JPG?
Choose PNG if you need true lossless output or the image contains fine text and sharp lines. If you just want the smallest possible file and the content is an ordinary photo, BMP to JPG goes smaller.
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