PNG转JPG转换器

将PNG图片转换为JPG格式：照片和截图的文件更小。

如何使用本工具

1
Click the file picker and select a single PNG image from your device.
2
Wait a moment while the tool draws the image to a canvas and encodes it as JPG.
3
Review the converted preview that appears below the picker.
4
Click Download JPG to save the result; the filename keeps the original name with a .jpg extension.

PNG使用无损压缩（适合边缘锐利的图形和透明背景）。JPG使用有损压缩（更适合照片）。当图片是照片时，将PNG转换为JPG可大幅减小文件大小，但透明背景会被替换为白色背景。

Shrinking a photo-heavy PNG screenshot so it fits under an email or upload size limit.
Preparing an image for a web form or marketplace that only accepts JPG uploads.
Flattening a transparent PNG onto a white background for a printed document or slide.
Reducing the page weight of photographic images before publishing them to a blog.
Converting a phone screenshot saved as PNG into a smaller JPG for sharing in chat.
Producing a JPG thumbnail from a PNG source when the destination ignores transparency anyway.

为什么我透明的PNG现在变成白色了？▼

JPG不支持透明。我们会在编码前用白色填充透明的像素。

这会损失质量吗？▼

JPG是有损的：总会有一些质量损失。我们采用92%的质量，在大多数照片上视觉上无法分辨。