将BMP图像转换为PNG格式。免费、即时，完全在浏览器中完成。
或者将图片拖放到这里。
支持JPG, JPEG, PNG, WEBP, SVG, GIF, HEIC, HEIF, BMP, TIFF, HDR, JP2, RAF, PSD, CR3, DNG, APNG, AVIF, AVI, ESP, EXR, J2C, J2K, JXL, PFM, PNM, PPM, PSB, SGI, MPEG, PDF
选择或拖放您的BMP文件。支持单个文件和批量转换，每个文件最大可达 50 MB。
高级算法将BMP转换为PNG ，同时保持质量并优化文件大小。
立即获取高质量的PNG图片。无需注册，完全免费使用。
PNG provides lossless compression with transparency support
Perfect for graphics, logos, and images requiring transparency
Deflate compression algorithm with alpha channel support
perfect for graphics with transparency with advanced PNG encoding
Perfect for graphics, logos, screenshots, web design
Handles uncompressed, large file size, simple format from BMP files
关于BMP和PNG格式的技术细节
Microsoft Windows bitmap
By default the BMP format is version 4. Use BMP3 and BMP2 to write versions 3 and 2 respectively. Use -define bmp:ignore-filesize to ignore the filesize check.
Portable Network Graphics
Requires libpng-1.0.11 or later, libpng-1.2.5 or later recommended. The PNG specification does not support pixels-per-inch units, only pixels-per-centimeter. To avoid reading a particular associated image profile, use -define profile:skip=name (e.g. profile:skip=ICC).
关于将bmp图像转换为png格式的常见问题。
