Convert BMP to PNG
BMP files are uncompressed and oversized. PNG keeps every pixel at a fraction of the size and opens anywhere. Convert here — locally, nothing uploaded.
BMP vs PNG: what changes
BMP is an old Windows bitmap format that stores pixels with little or no compression, so the files are far bigger than they need to be. They also feel out of place on the modern web and in cross-platform workflows.
Converting to PNG is almost always an upgrade. PNG is lossless too, so no quality is lost, but its compression typically makes the file several times smaller. PNG also opens in every browser, editor, and operating system, where BMP can be awkward. Transparency, if the bitmap has any, is preserved.
How to convert BMP to PNG
- Open the converterOpen FavGrab from the button above — no sign-up, no install.
- Drop the BMP filesAdd one .bmp or a whole batch onto the dropzone.
- Choose PNGSelect PNG — it’s lossless, so there’s no quality setting to worry about.
- Convert & saveConvert and download each PNG, or grab the whole set as a ZIP.
BMP vs PNG at a glance
BMP
- Compression
- Uncompressed — needlessly large files
- Transparency
- Not in practice
- Compatibility
- Opens on Windows and most editors, but bulky
- Best for
- Raw bitmaps and legacy Windows tools
PNG
- Compression
- Lossless — no quality loss
- Transparency
- Yes (full alpha channel)
- Compatibility
- Universal
- Best for
- Logos, screenshots, icons, line art, anything with transparency
When to convert BMP to PNG
- Shrinking a BMP without losing any quality
- Using a legacy bitmap on the modern web
- Opening an image reliably across platforms
- Modernising old Windows image assets
Why convert in your browser
Nothing is uploaded
Every byte is decoded and re-encoded on your own machine using Canvas and WebAssembly. Your images never touch a server, so there is no upload bar, no queue, and no copy of your file sitting in someone else’s bucket.
Works offline
After the first load the converter is cached. Open it on a plane, on hotel Wi-Fi, or with the cable unplugged and it still runs at your CPU’s full speed.
Frequently asked questions
Will I lose quality converting BMP to PNG?
No. Both formats are lossless, so every pixel is preserved exactly — PNG simply stores it far more efficiently.
How much smaller will the PNG be?
Often several times smaller, because BMP is essentially uncompressed while PNG applies lossless compression. The converter shows the resulting size for each file.
Are my files uploaded?
No. The conversion runs entirely in your browser; your images stay on your device.
Can I convert several BMPs at once?
Yes — add a batch, convert them together, and download all the PNGs in a single ZIP.
Related converters
Modernise those bitmaps
Convert BMP to PNG locally — lossless, smaller, and opens everywhere.
Open the converter →