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如何把图片转换成Jpeg格式

下载PDF文件

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下载PDF文件

我们在上传图片时，常常因为文件格式不是Jpeg而上传不了，十分恼人。wikiHow来帮你——下文是转换文件格式的方法。

方法 1

方法 1 的 3:

在任何电脑上转换

下载PDF文件

{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/f\/f6\/Convert-Pictures-To-Jpeg-Step-1-Version-4.jpg\/v4-460px-Convert-Pictures-To-Jpeg-Step-1-Version-4.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/f\/f6\/Convert-Pictures-To-Jpeg-Step-1-Version-4.jpg\/v4-728px-Convert-Pictures-To-Jpeg-Step-1-Version-4.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/7\/7b\/Convert-Pictures-To-Jpeg-Step-2-Version-4.jpg\/v4-460px-Convert-Pictures-To-Jpeg-Step-2-Version-4.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/7\/7b\/Convert-Pictures-To-Jpeg-Step-2-Version-4.jpg\/v4-728px-Convert-Pictures-To-Jpeg-Step-2-Version-4.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/8\/89\/Convert-Pictures-To-Jpeg-Step-3-Version-4.jpg\/v4-460px-Convert-Pictures-To-Jpeg-Step-3-Version-4.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/8\/89\/Convert-Pictures-To-Jpeg-Step-3-Version-4.jpg\/v4-728px-Convert-Pictures-To-Jpeg-Step-3-Version-4.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}

注意不要选择“保存”，因为我们想转换它而不是保存现有的格式。
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/a\/a7\/Convert-Pictures-To-Jpeg-Step-4-Version-4.jpg\/v4-460px-Convert-Pictures-To-Jpeg-Step-4-Version-4.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/a\/a7\/Convert-Pictures-To-Jpeg-Step-4-Version-4.jpg\/v4-728px-Convert-Pictures-To-Jpeg-Step-4-Version-4.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/0\/0a\/Convert-Pictures-To-Jpeg-Step-5-Version-4.jpg\/v4-460px-Convert-Pictures-To-Jpeg-Step-5-Version-4.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/0\/0a\/Convert-Pictures-To-Jpeg-Step-5-Version-4.jpg\/v4-728px-Convert-Pictures-To-Jpeg-Step-5-Version-4.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}

一般这个选项旁边会跟着*.jpg;*.jpeg;*.jpe;*.jfif这些文件名后缀。
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/2\/24\/Convert-Pictures-To-Jpeg-Step-6-Version-4.jpg\/v4-460px-Convert-Pictures-To-Jpeg-Step-6-Version-4.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/2\/24\/Convert-Pictures-To-Jpeg-Step-6-Version-4.jpg\/v4-728px-Convert-Pictures-To-Jpeg-Step-6-Version-4.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}

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方法 2

方法 2 的 3:

在Mac上转换

下载PDF文件

{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/f\/fe\/298983-7.jpg\/v4-460px-298983-7.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/f\/fe\/298983-7.jpg\/v4-728px-298983-7.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}

它可能和例子中一样放在桌面上，也可能在Finder里。
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/7\/70\/298983-8.jpg\/v4-460px-298983-8.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/7\/70\/298983-8.jpg\/v4-728px-298983-8.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}

这样你就可以将它重命名。
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/6\/63\/298983-9.jpg\/v4-460px-298983-9.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/6\/63\/298983-9.jpg\/v4-728px-298983-9.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}

也就是说将“.”之后的文件名后缀删掉。
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/9\/90\/298983-10.jpg\/v4-460px-298983-10.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/9\/90\/298983-10.jpg\/v4-728px-298983-10.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/6\/60\/298983-11.jpg\/v4-460px-298983-11.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/6\/60\/298983-11.jpg\/v4-728px-298983-11.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
6

完成。

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方法 3

方法 3 的 3:

在Mac上转换（另一种）

下载PDF文件

{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/b\/b2\/298983-13.jpg\/v4-460px-298983-13.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/b\/b2\/298983-13.jpg\/v4-728px-298983-13.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/2\/26\/298983-14.jpg\/v4-460px-298983-14.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/2\/26\/298983-14.jpg\/v4-728px-298983-14.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/a\/a7\/298983-15.jpg\/v4-460px-298983-15.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/a\/a7\/298983-15.jpg\/v4-728px-298983-15.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/8\/82\/298983-16.jpg\/v4-460px-298983-16.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/8\/82\/298983-16.jpg\/v4-728px-298983-16.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/c\/c7\/298983-17.jpg\/v4-460px-298983-17.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/c\/c7\/298983-17.jpg\/v4-728px-298983-17.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}
{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/1\/1e\/298983-18.jpg\/v4-460px-298983-18.jpg","bigUrl":"https:\/\/www.wikihow.com\/images\/thumb\/1\/1e\/298983-18.jpg\/v4-728px-298983-18.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"}

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小提示

如果JPEG不可用，那么你可以试着保存为.jpg格式，或下载其他图形处理软件进行处理。
如果你在使用Adobe Photoshop或其他类似的程序，上面有“储存为网页所用格式”选项，使用它有同样的效果。

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警告

尽量不要使用微软的画图程序。它保存图片的质量会很差。
有时将图片保存为Jpegs会破坏图像，所以一定要记得复制一份作为副本。

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