All Converter Pro
在线 图片压缩器
在线免费压缩 JPG、PNG 和 WebP 图片。通过您控制的质量设置将文件大小减少 50-90%。适用于邮件、网页和上传限制。
关于此 图片压缩器 工具
The Image Compressor reduces an image's file size while keeping it looking good - typically 50–90% smaller for photos, depending on the quality level you pick. The image stays in its original format and dimensions; the tool re-encodes it more efficiently and lets you trade a little (usually invisible) quality for a lot of size. Use it when an upload form rejects your file, an email attachment is too heavy, or a web page loads slowly because of image weight. Compression is the single biggest lever for page speed: a 4 MB camera photo compressed to 400 KB looks identical on screen and loads ten times faster.
如何使用 图片压缩器
- 打开工具并添加您的文件、文字或数值。
- 检查可用选项,例如页面范围、输出格式、质量、密码或语言。
- 开始处理,并在完成前保持浏览器窗口打开。
- 下载结果,如有需要可继续使用相关工具。
实用提示
- 对于扫描的 PDF,支持 OCR 的工具会尽可能自动运行文字识别。
- 对于大文件,在通过邮件分享或上传到门户网站之前,请使用压缩工具。
- 为获得最佳效果,请上传扩展名正确的干净文件,避免使用损坏的文档。
How to compress an image online in 3 steps
Step 1: upload a JPG, PNG or WebP image. Step 2: choose a quality level. Step 3: download the smaller file. The image keeps its original width and height.
For email and web pages, a medium-high quality setting usually cuts the size by half or more with no visible loss.
Compress an image to 100 KB, 200 KB or 500 KB
Many forms ask for a photo under a fixed size. Start with a medium quality setting and check the result. If it is still too big, lower the quality a little and compress again.
Photos compress far better than screenshots. If a PNG will not get small enough, convert it to JPG first with PNG to JPG, then compress.
Compress, resize or convert - which do you need?
Compress (this tool) when the pixel dimensions are fine but the file is too heavy - the usual case for uploads and email.
转换 to another format when the format itself is the problem: PNG photos should usually become JPG (PNG to JPG), and web images become WebP (WebP Converter) for the smallest sizes.
Both at once: converting a PNG photo to JPG and then compressing it gives the largest total reduction.
常见问题
How much smaller will my image get?
Photos typically shrink 50–90% depending on the quality setting and how compressed the source already was. Screenshots and graphics compress less dramatically than photos.
Will I see the quality difference?
At moderate compression, almost never - screen viewing hides far more than print. Heavy compression eventually shows as softness and blocky artifacts, most visibly on sharp edges and text.
Does compression change the image dimensions?
No. Width and height in pixels stay the same; only the file size drops. The image is re-encoded, not resized.
Which formats can be compressed?
JPG, PNG and WebP. The output stays in the same format as the input, so nothing else in your workflow changes.
What quality setting should I choose?
For web and email, a medium-high setting is the sweet spot - big savings, invisible loss. Use the highest setting for images that will be printed or edited again.
the compressor 免费吗?
Yes - free, no account, no watermark, files cleaned from temporary storage automatically.