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Compress JPG images

压缩 JPG 文件，上传更快，画面依然自然。

快速解答

To compress a JPG, upload it to ezimagetools.com, choose how hard to squeeze it, and download the smaller file. A JPG is already compressed, so compressing it again means re-encoding it at a lower quality setting. The width and height never change — only the file size does. It is free, needs no account, and your upload is deleted within an hour.

概览

支持的格式
JPG files, up to 20 at a time
输出结果
A smaller JPG at exactly the same width and height
单个文件上限
每个文件 50 MB
每批文件数
一次最多 20 个
价格
免费，处理数量不限
是否需要账号
不需要，无需注册
文件删除时间
处理后一小时内自动删除

更新于 2026-08-31

如何压缩 jpg

  1. Add your JPG files

    Tap the upload box and pick the JPG images you want smaller, or drag them in.

  2. Choose how much to shrink

    Recommended is the best balance. Smallest file goes further when size matters more than detail.

  3. Press Compress

    You will see exactly how many kilobytes each file lost before you download anything.

  4. Download

    Save the smaller JPG files. A batch comes back as one ZIP.

What a JPG is

JPG (also written JPEG) is the format almost every camera and website uses. It saves space by discarding the detail your eye is least likely to notice, which is why it cannot store transparency and why every re-save costs a little quality.

What we do to your file

We re-encode the picture with an optimised encoder, strip out the camera and location metadata you probably did not mean to publish, and convert the colour profile to standard sRGB so it looks the same everywhere. The picture itself is never cropped or resized.

常见问题

How does compressing a JPG work?

A JPG is already compressed, so compressing it again means re-encoding it at a lower quality setting. Between 75 and 85 the loss stays invisible on a photograph while the file roughly halves. Below about 60 you start to see blocky squares in smooth areas like sky and skin.

Will compressing my JPG make it look worse?

Not at the Recommended setting. JPG is a lossy format, so something is always discarded, but the encoder starts with the detail your eye is least able to see. Push it to Smallest file on an image with large flat areas and you may start to notice banding.

How much smaller will my JPG get?

A photo usually drops by 60 to 80% at the Recommended level. Pictures full of fine detail — foliage, gravel, hair — compress least, because there is little the encoder can safely simplify.

Does compressing a JPG change its dimensions?

No. Compression changes only the number of bytes the file takes up. The width and height in pixels are untouched. Use the Resize tool if you want fewer pixels, and do that first — resizing then compressing beats compressing alone.

Can I compress a JPG to an exact size in KB?

Yes. Enter a target size and the compressor searches for the highest quality setting that still fits under your limit. That is more reliable than guessing at a quality number, especially when an upload form has a hard cap.

Is it safe to compress JPG files online?

Yes. Your file is processed on our server and deleted automatically within one hour. We never look at it and there is no account to create.

Your images are processed on our server and deleted automatically within one hour. We never look at them and you do not need an account.

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