Convert BMP to PNG
Compress huge uncompressed BMP bitmaps into tidy lossless PNGs without changing a single pixel.
What happens when you convert BMP to PNG
BMP stores pixels essentially raw, with almost no compression, which is why BMP files are enormous relative to what they contain. PNG compresses the exact same pixels losslessly. You usually get a dramatically smaller file with mathematically identical image data.
Good for
- Reclaiming disk space from scanned or exported BMP archives
- Making legacy Windows output usable on the web, where BMP is impractical
- Preparing old image assets for a modern design tool
Worth knowing
- This is genuinely lossless — every pixel is preserved exactly.
- Size savings vary hugely: flat graphics may shrink by 90%, photographic noise much less.
- BMP files with unusual bit depths or colour tables are normalised by the browser's decoder.
BMP to PNG, answered
How do I convert BMP to PNG?
Drop your BMP file into the box above (or click to browse), make sure PNG is selected as the target format, press Convert, then download the result.
Is this BMP to PNG converter really private?
Yes. The conversion runs entirely in your browser — your BMP file is never uploaded to any server, so nobody but you ever sees it.
Is converting BMP to PNG free?
Completely free — no watermarks, no sign-up and no daily quota. Processing happens on your own device, so there are no server costs to pass on to you.
Can I convert multiple BMP files at once?
Yes — drop as many files as you like. Convert them individually or use "Convert all", then download everything as a single ZIP.