Convert BMP to PNG Online Free
Convert uncompressed BMP bitmaps to PNG format. Get dramatically smaller files with lossless compression - every pixel is preserved exactly while file size drops by 50-80%.
To convert BMP to PNG, drop your BMP file into the converter above. PNG uses lossless compression to reduce the file size by 50-80% without losing a single pixel of quality. The conversion runs entirely in your browser and your files are never uploaded anywhere.
Convert BMP to PNG
Drop your BMP file here to convert it instantly
Drag & drop your .bmp file here, or click to browse
Your file never leaves your browser
BMP vs PNG: Format Comparison
Key differences between the two formats
When to Convert
Common scenarios where this conversion is useful
Lossless compression of legacy files
BMP files from older systems waste enormous amounts of disk space. PNG provides identical quality with 50-80% smaller file sizes - perfect for archiving without any quality sacrifice.
Preparing images for web use
BMP files can't be used on the web. Converting to PNG gives you a web-ready format with full browser support and much more reasonable file sizes.
Enabling transparency for editing
BMP has very limited transparency support. Converting to PNG lets you work with full alpha channel transparency in any modern image editor.
Cross-platform sharing
BMP is primarily a Windows format. PNG works on every platform - Windows, macOS, Linux, iOS, and Android. Convert for universal compatibility.
How to Convert BMP to PNG
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1
Drop your BMP file
Drag and drop your BMP bitmap into the converter, or click browse to select it.
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2
Lossless conversion
The browser reads the uncompressed BMP data and encodes it as a lossless PNG. Every pixel is preserved exactly.
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3
Download the PNG
Save the PNG file. It's much smaller than the BMP but contains identical image data with no quality loss.
Frequently Asked Questions
Yes. PNG uses lossless compression (DEFLATE algorithm), meaning every single pixel is preserved exactly as it was in the BMP. You can convert back and forth without any quality degradation.
Typically 50-80% smaller for photographic content, and even more for simple graphics. A 15MB BMP screenshot might become 3-5MB as PNG. Graphics with large areas of solid color compress especially well.
JPG offers smaller files but with lossy compression - you lose some quality. BMP to PNG preserves every pixel exactly. Choose PNG when quality matters, JPG when file size matters most.
Yes. If your BMP file contains alpha channel data (32-bit RGBA), the transparency will be preserved in the PNG output.
Absolutely. Pixel art needs lossless compression to maintain crisp edges and exact color values. PNG is the standard format for pixel art and BMP to PNG is a lossless conversion.
The converter handles all BMP color modes including 1-bit, 4-bit, 8-bit indexed, 24-bit, and 32-bit. The output PNG preserves the color information accurately.
Yes. All processing happens locally in your browser. No files are transmitted over the internet. This is safe for proprietary, medical, legal, or any sensitive images.
Yes. While BMP is associated with Windows, this converter works in any browser on any operating system - macOS, Windows, Linux, iOS, and Android.
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