BMP to PNG
BMP files are uncompressed and massive — a relic of early Windows computing. Converting to PNG gives you the same lossless quality at a fraction of the file size with universal compatibility. FluidConvert converts BMP to PNG free, instantly in your browser.
Drop your file here, or browse
Accepts: image/bmp, .bmp · Max 100MB (free)
Your files are encrypted with TLS and automatically deleted after conversion.
Simply upload your .BMP file and we'll convert it to .PNG format — fast, free, and secure.
Fast & Free
Convert files up to 100MB at no cost. No account needed.
Secure
Files are encrypted and automatically deleted after conversion.
High Quality
Industry-leading conversion with no quality loss.
How to Convert BMP to PNG
Upload Your File
Click the upload area above or drag and drop your .BMP file. We support files up to 100MB on the free plan.
Choose Output Format
Select .PNG as your target format. Adjust any conversion settings if needed.
Download Your File
Click Convert Now and wait a few seconds. Once complete, download your converted file instantly.
About BMP to PNG
What is BMP?
BMP (Bitmap) is one of the oldest image formats, created by Microsoft for Windows 2.0 in 1988. It stores images as an uncompressed grid of pixels — what you see is exactly what's stored, with zero compression. A 1920x1080 full-color BMP is about 6MB, while the same image as PNG would be 1-2MB. BMP is still encountered in legacy Windows applications, embedded systems, and some screenshot tools.
Why convert to PNG?
PNG offers lossless compression that's typically 3-5x smaller than BMP with zero quality loss. Every modern device and application supports PNG, while BMP support is inconsistent outside Windows. Convert BMP to PNG to reduce file sizes for sharing, gain transparency support, and ensure compatibility across all platforms including Mac, Linux, and mobile devices.
What to expect from the conversion
BMP to PNG is completely lossless — every pixel is preserved exactly. The only change is the addition of DEFLATE compression, which reduces file size dramatically without any quality impact. A 6MB BMP typically becomes a 1-2MB PNG. Transparency is added as a capability (though BMP images have solid backgrounds, the PNG format supports adding transparency later in an editor).
How FluidConvert handles it
We decode the BMP pixel data and compress it into optimized PNG with maximum DEFLATE compression for the smallest possible lossless file. The conversion is instant and completely lossless.
Common reasons to convert BMP to PNG
- Converting legacy Windows screenshot BMPs to PNG for modern use
- Reducing the file size of BMP images from embedded systems or scientific instruments
- Making BMP images from old software compatible with web platforms and Mac applications
- Converting BMP textures from legacy applications to PNG for use in modern game engines
Frequently Asked Questions
Is there any quality loss converting BMP to PNG?
Absolutely none. Both formats store pixel data losslessly. PNG simply adds compression to reduce file size. The output is mathematically identical to the BMP source — every pixel, every color value is exactly the same.
Why are BMP files so large compared to PNG?
BMP stores every pixel's color value without any compression at all. PNG uses DEFLATE compression to represent the same data more efficiently. It's like the difference between a raw text file and a ZIP file — same content, smaller package.
Can I convert a 4-bit or 8-bit BMP to PNG?
Yes. BMP files with reduced color palettes (4-bit = 16 colors, 8-bit = 256 colors) convert to PNG with the same color palette. PNG supports all color depths from 1-bit to 48-bit.