Convert BMP to PNG Online Free
Convert BMP files to lossless PNG. Keep your graphics, text, and logos perfectly pixel-precise while reducing overall storage size using PNG's compression.
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How to Convert BMP to PNG
Step 1
Drop your BMP files into the converter.
Step 2
Click "Convert" to encode the bitmap pixels into lossless PNG structures.
Step 3
Download the optimized, high-fidelity PNG files.
About the BMP & PNG Formats
BMP (Bitmap Image File)
BMP is a raster graphics image file format used to store bitmap digital images, independently of the display device. It stores color data for each pixel in the image without any compression.
- Extremely simple structure, easy to read and write programmatically
- Lossless and uncompressed, retaining exact color and layout information
- Broad compatibility on Windows systems
- Massive file sizes because it does not use compression
- Highly inefficient for web usage or distribution
- No support for transparency or metadata in standard forms
PNG (Portable Network Graphics)
PNG is a raster-graphics file-format that supports lossless data compression. It was created as an improved, non-patented replacement for Graphics Interchange Format (GIF).
- Lossless compression retains perfect quality
- Supports full transparency (alpha channel)
- Excellent for graphics, text, and line art
- Significantly larger file sizes than JPG for photographs
- Does not support animation (unlike APNG which is less compatible)
- Not optimized for print graphics (no CMYK support)
BMP vs PNG Comparison
| Feature | BMP | PNG |
|---|---|---|
| Type (类型) | Raster Graphics (位图) | Raster Graphics (位图) |
| Transparency (透明度) | No (不支持) | Yes (支持) |
| Animation (动画) | No (不支持) | No (不支持) |
| Compression (压缩) | None (未压缩) | Lossless (无损压缩) |
| Compatibility (兼容性) | Universal (系统底层支持) | Universal (完美兼容) |
Frequently Asked Questions
Is BMP to PNG conversion lossless?
Yes. Both formats store images losslessly. However, PNG uses Deflate compression, which significantly reduces the storage footprint without altering any pixel data.