将BMP图像转换为JPEG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JPEG ，同时保持质量并优化文件大小。
立即获取高质量的JPEG图片。无需注册，完全免费使用。
Convert BMP to JPEG for better compatibility and optimization
Improved file compatibility and optimized performance
Professional-grade conversion with quality preservation
excellent for photos with advanced JPEG encoding
Perfect for photography, web images, social media
Handles uncompressed, large file size, simple format from BMP files
关于BMP和JPEG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.
Joint Photographic Experts Group JFIF format
Note, JPEG is a lossy compression. In addition, you cannot create black and white images with JPEG nor can you save transparency. Requires jpegsrc.v8c.tar.gz. You can set quality scaling for luminance and chrominance separately (e.g. -quality 90,70). You can optionally define the DCT method, for example to specify the float method, use -define jpeg:dct-method=float. By default we compute optimal Huffman coding tables. Specify -define jpeg:optimize-coding=false to use the default Huffman tables. Two other options include -define jpeg:block-smoothing and -define jpeg:fancy-upsampling. Set the sampling factor with -define jpeg:sampling-factor. You can size the image with jpeg:size, for example -define jpeg:size=128x128. To restrict the maximum file size, use jpeg:extent, for example -define jpeg:extent=400KB. To define one or more custom quantization tables, use -define jpeg:q-table=filename. These values are multiplied by -quality argument divided by 100.0. 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jpeg格式的常见问题。
