Is this PDF compressor free?
Yes. You can compress PDF files online for free without installing desktop software.
URL: https://www.mixtoolshub.com/pdf/compress
Compress PDF files online to reduce document size for email, cloud storage, and web sharing.
MixToolsHub processes your PDF in the browser, so the original file stays on your device while you choose the balance between quality and file size.
在线压缩 PDF 文件，减少文档大小，方便通过邮件发送、云端存储和网页分享。
MixToolsHub 在浏览器本地处理 PDF，原始文件不会离开您的设备，同时可以在画质和文件大小之间选择合适的平衡。
Yes. You can compress PDF files online for free without installing desktop software.
No. PDF compression is performed in your browser, and the original file is not sent to MixToolsHub's server.
Yes. Choose light, balanced, or strong compression depending on whether you prefer higher quality or a smaller file.
免费。无需安装桌面软件，即可在线压缩 PDF 文件。
不会。PDF 压缩在浏览器本地完成，原始文件不会发送到 MixToolsHub 服务器。
可以。您可以选择低、中或高压缩强度，在更高画质和更小文件之间进行平衡。
Click the upload area or drag and drop your PDF file onto the page. Files are processed entirely in your browser — nothing is sent to any server.
Select a compression preset: Low (best quality), Medium (balanced), or High (smallest file size). A live preview shows the estimated output size.
Click "Compress" and wait a moment. Once done, click "Download" to save your smaller PDF. The original file is never modified.
点击上传区域，或将 PDF 文件拖放到页面中。所有处理均在您的浏览器本地完成，文件不会上传到任何服务器，完全保护您的隐私。
根据需求选择压缩程度：低（画质最佳）、中（均衡）或高（文件最小）。页面会实时显示预计输出文件大小，方便您做出选择。
点击「压缩」按钮，稍等片刻处理完成后，点击「下载」即可保存压缩好的 PDF。原始文件不会被修改。