PNG轉JPG轉換器

將PNG圖片轉換為JPG格式：照片和螢幕截圖的檔案更小。

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使用無損壓縮（適合邊緣銳利的圖形和透明背景）。JPG使用有損壓縮（更適合照片）。當圖片是照片時，將PNG轉換為JPG可大幅減小檔案大小，但透明背景會被取代為白色背景。

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.

為什麼我透明的PNG現在變成白色了？▼

JPG不支援透明。我們會在編碼前用白色填滿透明的像素。

這會損失品質嗎？▼

JPG是有損的：總會有一些品質損失。我們採用92%的品質，在大多數照片上視覺上無法分辨。