BMP to PNG Converter
without uploading it.
Convert an uncompressed BMP into a lossless PNG — smaller file, identical pixels, right in your browser.
Drop an image, or click to browse
Drop a BMP file or click to browse.
Click "Convert to PNG".
Download the result.
Why there's no upload step
PNG stores exactly the same pixels as a BMP but compresses them losslessly — you typically get a file several times smaller with zero quality loss. That makes PNG the right choice when converting screenshots, diagrams, or anything with text and sharp edges. The conversion runs entirely on your device.
Is my BMP uploaded anywhere?+
No. The conversion happens entirely in your browser.
Is any quality lost?+
None — PNG is lossless, so every pixel is identical to the BMP. It's just stored more efficiently.
How much smaller will it be?+
Depends on the content: screenshots and graphics often shrink 3–10×; noisy photos shrink less (for photos, BMP to JPG gives far smaller files).
Why not keep using BMP?+
Nothing on the modern web accepts BMP uploads, and the format wastes space. PNG opens everywhere and behaves identically.