Image
Convert BMP to PNG Online — Free
BMP is huge and uncompressed; PNG is lossless and ~10× smaller. ReFile re-encodes pixel-for-pixel — no quality change, just a much smaller file.
- No signup to try
- Sandboxed processing
- Files deleted in 24 h
What this does
- Lossless — every pixel preserved
- Typical 5–15× size reduction
- Transparency supported (PNG handles alpha; BMP does not)
How it works
- 1
Upload your BMP
Drop it above, or click to pick from your device. We validate the format immediately — no spinning on a file we can't process.
- 2
Run the conversion
The recipe runs in an isolated cloud sandbox — same as every other ReFile job. No AI guessing involved; it's a hand-written command that does one thing.
- 3
Download the PNG
Result lands in seconds. Files auto-delete from our servers after 24 hours; signed download URLs expire in the same window.
Frequently asked
- Does the image change?
- No — PNG is lossless. The file is smaller because PNG compresses pixel data while BMP stores it raw.