BMP → PNG
Converting locally — nothing is uploaded
Uncompressed to lossless, still faithful — free, and finished on your machine.
Drop your BMPs in the drum
or — nothing leaves this tab
READS JPG · PNG · WEBP · GIF · BMP · SVG · AVIF
CYCLE →
WASH TEMP
OUT OF ORDER — JAM REPORT
The BMP → PNG cycle
Every pixel your scanner captured stays exactly as captured — the file simply learns what compression without loss looks like.
PNG keeps transparency; BMP had none to give. PNG is lossless, so weight follows content — graphics shrink, photos grow. Either way, re-encoding through the canvas collects EXIF like lint — camera model, GPS coordinates and timestamps are stripped from the folded copy.
Need the other direction? Other routes into JPG → PNG, WebP → PNG, GIF → PNG, SVG → PNG.
Questions at the counter
Is BMP to PNG truly lossless?
Completely. Both store exact pixel values; PNG merely compresses them intelligently. Scanned documents and archival images pass through untouched.
How much smaller will it be?
Typically 2–10× depending on content — runs of flat colour compress dramatically, noise barely at all. Either way, never larger.
What about the alpha channel some BMPs claim?
Most BMPs are fully opaque, and those convert trivially. The rare 32-bit variants carry padding rather than useful transparency; it is normalised away.
Is the conversion really private?
Yes — architecturally. This page is static files; there is no server to receive an upload. Your BMP is decoded and re-encoded inside this tab by your own machine, and you can watch the absence of network traffic in your browser’s developer tools.