将JPG图像转换为JXL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
支持JPG, JPEG
选择或拖放您的JPG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JPG转换为JXL ，同时保持质量并优化文件大小。
立即获取高质量的JXL图片。无需注册，完全免费使用。
将JPG转换为JXL以提高兼容性和优化效果
关于JPG和JXL格式的技术细节
Joint Photographic Experts Group JFIF format
Note, JPG is a lossy compression. In addition, you cannot create black and white images with JPG 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).
JPEG XL image coding system
Requires the JPEG XL delegate library.
关于将jpg图像转换为jxl格式的常见问题。
