Convert PNG to BMP — For Legacy Compatibility
PNG and BMP are both lossless, but BMP is much older and lacks compression. Converting PNG to BMP is typically needed when legacy software or embedded systems require BMP input. Note that BMP does not support transparency — any alpha channel from the PNG is flattened to a white background.
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HEIC, WEBP, AVIF, TIFF, BMP, SVG, GIF, PNG, JPG, PDF, CR2, NEF, ARW, DNG — up to 50MB each, or 50 from a folder
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Modern format with excellent compression. Limited browser support.
Apple's format. Excellent quality at small sizes.
Lossless format. Large files, ideal for print/archival.
256 colors max. Best for simple graphics.
Uncompressed bitmap. Very large files.
Vector trace. Best for logos and simple graphics. Not a pixel-perfect conversion.
Same format? You might want to compress instead.
SSIM-optimized — finds the lowest file size at your chosen visual fidelity.
Need to crop first? Use the Crop tool. Want to adjust or filter? Try the Editor.
Resize tool → Live preview, percentage scaling, and dimension presets.
Tip: Use PNG or WebP for transparent output. Standalone tool →
Lossless format — files can be large
GIF is limited to 256 colors
Best for logos, icons, and line art. Photos produce stylized results.
BMP files are uncompressed and can be very large. Consider TIFF (LZW) or PNG for lossless with smaller file sizes.
Leave empty for all pages. Multi-page PDFs produce a ZIP.
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PNG vs BMP Comparison
| Feature | PNG | BMP |
|---|---|---|
| Full Name | Portable Network Graphics | Bitmap Image File |
| Lossy Compression | ❌ | ❌ |
| Lossless Compression | ✅ | ✅ |
| Transparency | ✅ | ❌ |
| Animation | ❌ | ❌ |
| Browser Support | All browsers, all devices | Most browsers (legacy format) |
| Color Depth | 16.7M+ (24/32/48-bit) | 16.7M (24-bit) |
| Typical Use | Screenshots, graphics, logos, images needing transparency | Windows legacy, uncompressed images |
| Year Introduced | 1996 | 1986 |
Why Convert PNG to BMP?
Some legacy Windows applications, embedded systems, and industrial image processors only accept BMP format. Since both formats are lossless, the pixel data is preserved perfectly. The main difference is that transparency is lost and file size increases significantly because BMP has no compression.
How to Convert PNG to BMP
Upload your PNG file by dragging it into the converter or clicking to browse. Files up to 50 MB are supported.
KoalaPic converts to uncompressed 24-bit BMP, flattening any transparency to a white background.
Download the BMP file. Both files are automatically deleted after 1 hour.
Quality Note
Lossless conversion for pixel data, but PNG transparency is lost — transparent areas become white. BMP files are much larger than PNG because BMP has no compression. Consider whether TIFF (lossless with compression) might better serve your needs.