How much can I reduce a PDF file size?

Depending on content, PDFredo can reduce file sizes by 20% to 80%. PDFs with many images typically see the greatest reduction.

Will compression reduce PDF quality?

At low compression, quality is nearly identical to the original. Higher compression settings reduce image resolution to achieve smaller file sizes.

Smaller PDFs are easier to email, upload, and share. Compression is especially useful for PDFs with many photos or scanned pages.

No, you can compress as many PDFs as you like for free. No account needed.

Yes. Scanned PDFs (image-based) often compress well. For maximum text extraction, combine compression with our OCR tool.

Only image quality is affected. All text, fonts, and document structure remain identical.

在保持质量的同时减小PDF文件大小

将PDF拖放至此处或点击选择

支持所有PDF类型。压缩效果因内容而异：图像密集型PDF通常可压缩40–80%，纯文本PDF约10–20%。

最大 100 MB

图像质量可能下降压缩设置可能会降低图像质量。请在替换原始文件之前预览结果。

文件在欧盟境内的服务器上处理,并在 30 分钟后自动删除。我们不会存储、共享或分析您的文档。您需自行确保拥有处理所上传文件的权利。

安全服务器处理

无需安装直接在浏览器中使用

无限制处理任意数量的文件

符合GDPR下载后自动删除文件

100%免费无需账户或订阅

可以将PDF文件大小减少多少？

压缩会降低PDF质量吗？

为什么需要压缩PDF？

可以压缩的PDF数量有限制吗？

可以压缩扫描的PDF吗？

压缩会改变PDF内容吗？