BMP to PNG Converter
Convert bitmap images to PNG — much smaller files with no quality loss whatsoever. Runs in your browser.
- 100% private
- No sign-up
- No watermark
- Unlimited files
Conversion happens on your device using your browser's own image engine. Your files are never uploaded, so there is no size limit beyond your device's memory.
Smaller with nothing lost
This is the conversion to use when you need to keep every pixel exactly as it is. PNG compresses losslessly, so the image is bit-for-bit identical to the BMP while typically taking a fraction of the space.
That makes it the right choice for screenshots, diagrams, scanned documents and pixel art — anything where JPG compression would smear fine detail or text.
PNG or JPG?
For photographs, JPG will produce a far smaller file and the quality loss is invisible in practice. For anything with sharp edges, text or flat colour, PNG is the better destination even though the file is bigger.
Frequently asked questions
Are my files uploaded to a server?
No. The conversion runs inside your browser using your device's own processor. Your files are never transmitted anywhere, which is why the tool works even if you disconnect from the internet after the page loads.
Is any quality lost?
None. PNG compression is lossless, so the converted image is pixel-for-pixel identical to the original bitmap.
Why is PNG smaller than BMP if nothing is lost?
BMP stores every pixel raw with almost no compression. PNG compresses losslessly — same pixels, far fewer bytes.
Is there a file limit or a paywall?
There is no account, no watermark, and no upload cap. Because your device does the work, the only practical limit is your available memory. The site is funded by ads, not subscriptions.