跳到主要内容

Compress PNG images

压缩 PNG 文件，上传更快，画面依然自然。

快速解答

To compress a PNG, upload it to ezimagetools.com, choose how hard to squeeze it, and download the smaller file. PNG compression is lossless, so nothing is discarded: the savings come from storing fewer distinct colours. 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
PNG files, up to 20 at a time
输出结果
A smaller PNG 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 png

  1. Add your PNG files

    Tap the upload box and pick the PNG 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 PNG files. A batch comes back as one ZIP.

What a PNG is

PNG stores every pixel exactly as it was and is the common format that supports transparency. That makes it the right choice for screenshots, logos and flat graphics, and a wasteful one for photographs.

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 PNG work?

PNG compression is lossless, so nothing is discarded: the savings come from storing fewer distinct colours. Screenshots, logos and flat graphics can shrink dramatically. A photograph saved as PNG barely moves, and converting it to JPG will do far more for it than compressing it will.

Will compressing my PNG make it look worse?

No. PNG compression is lossless: every pixel comes back exactly as it went in. That is also why the savings are smaller than they would be on a lossy format — there is no quality to trade away.

How much smaller will my PNG get?

It depends entirely on the picture. A screenshot, a logo or a chart can lose most of its size, because those images use few distinct colours. A photograph saved as PNG will barely move; convert it to JPG or WEBP instead.

Does compressing a PNG 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 PNG 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 PNG 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.

相关工具