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Free online BMP to PNG converter. No signup, no watermark.
Convert BMP bitmap files to PNG for lossless compression without any quality loss. PNG reduces BMP file sizes by 50-80% while preserving every pixel exactly, making it ideal for screenshots, graphics, and images that need pixel-perfect accuracy.
Why Convert BMP to PNG?
- Reduce file size by 50-80% with zero quality loss
- Add transparency support not available in BMP
- Web-compatible format for immediate use
- Lossless — every pixel preserved exactly
BMP vs PNG
| Feature | BMP | PNG |
|---|---|---|
| Compression | None | Lossless |
| File Size | 5-50 MB | 1-10 MB |
| Quality | Pixel-perfect | Pixel-perfect |
| Transparency | No | Full alpha |
| Web Ready | No | Yes |
| Modern Usage | Legacy | Standard |
How to Convert BMP to PNG
- 1Upload your BMP files
- 2PNG is selected — no quality adjustment needed
- 3Download lossless PNG files
Frequently Asked Questions
Yes, both BMP and PNG store images without lossy compression. The conversion is completely lossless — every pixel is preserved exactly.
PNG files are typically 50-80% smaller than BMP. The exact reduction depends on image content — simple graphics compress more than complex photographs.
Choose PNG when your BMP contains screenshots, line art, text, logos, or graphics with sharp edges. PNG preserves these perfectly with lossless compression. For photographs or complex natural images, JPG is usually the better choice due to smaller file sizes.
Yes, completely. BMP stores raw uncompressed pixels and PNG uses lossless compression. Every single pixel is preserved identically — the only difference is that PNG applies smart compression to reduce the file size without discarding any data.
The conversion itself does not add transparent areas to your image. However, the resulting PNG file supports alpha transparency, so you can add transparent regions later using an image editor like Photoshop or GIMP.