About This Tool
What is PDF工具?
A tool for merging multiple PDF files into one or splitting specific pages from a PDF. All processing happens in your browser, so files are never uploaded to a server, maintaining document security.
How to Use
- In the 'Merge' tab, upload multiple PDFs and arrange order to combine.
- In the 'Split' tab, upload a PDF and select pages to extract.
- Drag files to rearrange order.
- Download the processed PDF.
Key Features
- Multiple PDF file merging
- Specific page splitting/extraction
- File order rearrangement
- Browser-based processing for security
Tips
- Large PDFs may take longer to process — check file sizes beforehand.
- Scanned PDFs are image-based and tend to have larger file sizes.
- Verifying page counts of each PDF before merging helps with ordering.
PDF工具
合并多个PDF或从PDF中拆分页面
拖放PDF文件到此处或点击上传
未上传文件
Frequently Asked Questions
PDF文件会上传到服务器吗？▼
不会。所有PDF处理完全在浏览器中使用JavaScript库（pdf-lib）进行。文件永远不会离开你的设备。可以安全处理机密文件、合同和其他敏感PDF。
有文件大小或页数限制吗？▼
没有严格限制，但非常大的PDF（超过100MB）可能导致浏览器变慢或内存不足。最佳性能建议单个文件不超过50MB。如处理似乎卡住，尝试关闭其他标签以释放内存。
合并前可以重新排列PDF顺序吗？▼
可以。上传多个PDF后，可拖放改变顺序或使用上移/下移按钮。合并输出将按文件列表中显示的顺序。合并前也可删除单个文件。