03
KEEP
Both files live on your device.
No cloud, no upload, no log.
What it actually does
01
DECODE
BMP pixel grid parsed in your tab.
Header, palette, run-length encoding — all handled locally.
02
ENCODE
PNG written with DEFLATE compression. Every pixel exact.
Lossless. Pixel-for-pixel identical. PNG is just a smarter, smaller bitmap.
04
BATCH
Convert a folder at once.
Each BMP becomes a PNG. Fully parallel, runs in your browser.
How it works
- Open morph.cool in any modern browser.
- Drop your .bmp file onto the drop zone, or click to browse.
- Pick PNG as the output format.
- Download your converted .png file. Done in seconds.
0%Lossless
0xSmaller
Why it lives in the tab
PNG is what BMP would have been if it were designed for the internet instead of for floppy disks. Same pixel data, same lossless guarantee, but stored with proper compression and a small, well-designed header. Converting BMP to PNG is the most predictable operation in the image-format universe: nothing changes about your pixels, the file just gets two-to-four times smaller. The whole conversion runs in your browser tab — no server, no upload, no compromise.
Frequently asked
Why is PNG smaller than BMP?
PNG uses DEFLATE compression — the same algorithm as ZIP. BMP doesn't compress at all. Same pixels, smaller file.
Is PNG truly lossless?
Yes — every pixel is preserved exactly. Convert BMP → PNG → BMP and you'd get the original back, byte for byte.
Does transparency carry over?
Yes. BMP can support alpha channels in 32-bit mode; PNG always supports transparency. Conversion preserves it.
Should I pick PNG or JPG for screenshots?
PNG. Screenshots have sharp edges and text — JPG's lossy compression introduces ugly halos around them. PNG keeps everything crisp.
Does this work on mobile?
Yes — the conversion engine runs in any modern browser, desktop or mobile.