JPG 圖片調整尺寸

JPG (JPEG) is a compressed image format that balances file size and visual quality. When resizing JPG images, it's important to understand how compression affects the final result.

Compression vs Quality

JPG uses lossy compression, meaning some image data is permanently removed to reduce file size. Lower quality settings create smaller files but may introduce visible artifacts such as blurriness or blockiness. Higher quality settings preserve more detail but result in larger files.

What Makes JPG Different?

Unlike PNG, JPG does not support transparency and is best suited for photographs and complex images with gradients. It is widely used for web images, social media, and digital photography.

Common Use Cases

  • Resize photos for websites or blogs
  • Optimize images for faster page loading
  • Prepare images for email attachments
  • Adjust dimensions for social media platforms

JPG 圖片調整尺寸

免費線上調整 JPG 圖片尺寸,在瀏覽器中快速且安全地處理。

第一步:上傳

圖片在您的裝置本地處理,不會上傳至任何伺服器。
🖼 拖曳圖片至此,或

第二步:設定

一般設定
縮放規則:
* 若設定百分比,寬度/高度將被忽略。
* 若同時設定寬度與高度,圖片將縮放至精確尺寸。
社群圖片預設尺寸
1080×1080,適用於 Instagram 貼文
1000×1000,正方形格式
1200px 寬,適合網頁使用
縮放行為
縮放選項:
對齊
背景
輸出格式

處理結果

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