Convert BMP to PNG — Lossless & Smaller
Upgrade your BMP files to PNG — the modern lossless format. PNG files are significantly smaller than BMP (thanks to DEFLATE compression) while preserving exact pixel quality. Plus you gain transparency support.
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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.
Conversion complete!
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BMP vs PNG Comparison
| Feature | BMP | PNG |
|---|---|---|
| Full Name | Bitmap Image File | Portable Network Graphics |
| Lossy Compression | ❌ | ❌ |
| Lossless Compression | ✅ | ✅ |
| Transparency | ❌ | ✅ |
| Animation | ❌ | ❌ |
| Browser Support | Most browsers (legacy format) | All browsers, all devices |
| Color Depth | 16.7M (24-bit) | 16.7M+ (24/32/48-bit) |
| Typical Use | Windows legacy, uncompressed images | Screenshots, graphics, logos, images needing transparency |
| Year Introduced | 1986 | 1996 |
Why Convert BMP to PNG?
PNG is the modern replacement for BMP. It offers lossless compression (BMP has none), transparency support, and universal compatibility. Every BMP can be converted to PNG with zero quality loss and significant size savings.
How to Convert BMP to PNG
Upload your BMP file.
KoalaPic converts to lossless PNG. Every pixel is preserved exactly.
Download your smaller PNG file.
Quality Note
This is a lossless conversion — zero quality difference. PNG files are typically 50-80% smaller than equivalent BMPs thanks to DEFLATE compression, with no visual trade-off whatsoever.