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Crop your JPG

把选框拖到你想保留的 JPG 区域上。

快速解答

To crop a JPG, upload it to ezimagetools.com and drag the selection box over the part you want to keep — everything outside the box is trimmed away. Lock the box to 1:1, 4:3 or 16:9 when a platform needs a particular shape. Cropping a JPG re-encodes only the part you keep. It is free and needs no account.

概览

支持的格式
One JPG at a time, so you can see what you are cropping
输出结果
Just the area you selected, still a JPG
单个文件上限
每个文件 50 MB
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

如何裁剪 jpg

  1. Add your JPG

    Tap the upload box and choose the JPG you want to crop.

  2. Drag the box

    Drag a corner to resize the selection and drag the middle to move it. It works with a finger.

  3. Lock a ratio if you need one

    Pick 1:1, 4:3 or 16:9 when the picture has to be a particular shape.

  4. Crop and download

    Press Crop, then save the trimmed JPG.

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.

Crop before you compress

If a picture needs both, crop it first. Cropping removes pixels, so the compressor then has less to work on and can spend its whole quality budget on the part you actually kept.

常见问题

Does cropping a JPG reduce its quality?

Cropping a JPG re-encodes only the part you keep. Crop before you compress, so the encoder spends its whole quality budget on the pixels that survive rather than on the ones you were about to throw away.

How do I crop a JPG to a square?

Choose the 1:1 ratio before you drag. The selection box then stays square whatever size you make it, which is what profile pictures and most product listings expect.

Can I crop a JPG on my phone?

Yes. The crop box is built for touch — drag the middle to move the selection and a corner to resize it. The page never zooms out from under you while you are dragging.

Will cropping make the file smaller?

Usually, yes, because there are fewer pixels left to store. How much smaller depends on how much you trimmed away. If you need a specific file size, run the cropped image through the Compress tool afterwards.

Can I undo a crop?

Not on the cropped file — the trimmed pixels are gone. Your original is untouched, though: we never overwrite what you uploaded, so you can start again from it.

Is it safe to crop JPG files online?

Yes. Your file is processed on our server and deleted automatically within one hour. We never look at it and you do not need an account.

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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