BMP to PNG Converter
Convert
The canvas previews the converted result live as you adjust the settings. Click Convert for the exact size and a before/after split — drag the divider to judge the quality, then download. The original file is never modified.
Your images are processed locally in your browser and never uploaded to any server.
Convert BMP to PNG and keep every pixel exactly while typically cutting the file 40–70%. PNG's lossless compression is built for exactly the raw pixel data BMP wastes space on. Runs locally, batch included.
When a BMP must not be altered, a scan with fine text, an instrument capture, a graphic destined for further editing, PNG is the right destination rather than JPG. PNG reconstructs every pixel bit-for-bit, so nothing is lost, yet its compression is genuinely effective on the raw data BMP stores uncompressed. You get the same image, exactly, in a substantially smaller and far more portable file.
How to use the bmp to png converter
- Add your BMP file(s).
- PNG needs no quality settings. Output is pixel-exact.
- Convert and download.
- Batch results arrive as one ZIP.
Lossless, but much smaller
Choose this over BMP to JPG whenever fidelity matters more than reaching the absolute smallest size: documents, line art, scans containing text, and anything with sharp edges all keep their crispness in PNG, where JPG would introduce faint artefacts around them. The conversion is completely reversible in quality terms, since no pixel is changed.
Most BMPs are 24-bit with no transparency, so there is usually no alpha channel to worry about; where one does exist, PNG carries it over properly. The typical result is a file 40–70% smaller than the bitmap that opens in every browser and editor, which is exactly what makes an archived BMP usable again.
Frequently asked questions
Is BMP to PNG lossless?
Completely. PNG's DEFLATE compression reconstructs every pixel bit-for-bit. This is the right conversion when BMPs come from scanners or instruments and must not be altered, just made smaller.
PNG or JPG from BMP: which should I pick?
Photographic content → JPG (smallest, imperceptible loss). Graphics, scans with text, anything needing pixel fidelity or transparency → PNG. When unsure, PNG is the safe choice; JPG is the small choice.
Does BMP support transparency?
Rarely and awkwardly. Most BMPs are 24-bit with no alpha. Where an alpha channel exists, PNG carries it over properly; flat BMPs simply gain nothing to lose.