PDF 工具
压缩PDF
在保持可读质量的同时减小PDF文件大小
Compress PDF Online — Reduce PDF File Size
Reduce PDF file size while maintaining quality. Useful for email attachments, faster website loading, and saving storage space. All processing in your browser.
FAQ
How much can I reduce a PDF file size?
Depends on content. PDFs with many images can be reduced 50–90%. Text-only PDFs compress much less — they're already small.
What is the maximum email attachment size?
Gmail: 25MB. Outlook: 20MB. Most corporate email: 10–25MB. Compress PDFs above these limits before sending.
Will compressing change the PDF content?
No — content is preserved. Only image resolution may be slightly reduced at high compression settings.