合并PDF
将多个PDF文件合并为一个文档
浏览器处理
文件在您的浏览器中本地处理
自动删除
处理后文件自动删除
无需注册
无需创建账户即可使用所有工具
随处可用
任何设备、任何浏览器，无需安装
如何合并PDF文件
- 1
点击"选择PDF文件"或将文件拖放到上传区域来上传您的PDF文件。
- 2
查看文件列表，确保它们按正确的顺序排列以进行合并。
- 3
点击"合并PDF"按钮将所有文件合并为一个文档。
- 4
下载合并后的PDF文件，享受您的合并文档！
Why Merge PDF Files?
Combining multiple PDF documents into a single file is one of the most common document management tasks. Whether you're consolidating reports, combining scanned pages, or organizing project files, merging PDFs saves time and keeps your documents organized.
Common Use Cases
- Business Reports: Combine monthly reports, financial statements, or presentations into quarterly or annual compilations.
- Legal Documents: Merge contracts, addendums, and supporting documents into complete case files.
- Academic Work: Combine research papers, references, and appendices into a single submission.
- Scanned Documents: Merge multiple scanned pages into one cohesive document.
Tips for Best Results
Before merging, ensure all your PDFs are in the correct orientation. Use our Rotate PDF tool if needed. For large merges, consider the final file size - our Compress PDF tool can help reduce it after merging.
常见问题
How do I merge PDF files?
Upload your PDF files, arrange them in the desired order, and click "Merge PDF" to combine them into a single document.
Is merging PDFs free?
Yes, our PDF merge tool is completely free with no limits on file size or number of files.
Are my files secure?
All processing happens in your browser. Your files never leave your device, ensuring complete privacy.
Can I merge PDFs on my phone?
Yes, our tool works on any device with a web browser, including iPhones, Android phones, and tablets. No app download required.
Can I change the order of PDFs before merging?
Yes, after uploading you can drag and drop files to rearrange them in any order before combining.
How many PDF files can I merge at once?
There's no limit on the number of files. You can merge 2 PDFs or 100+ PDFs in a single operation. For very large batches, we recommend merging in groups for best performance.
What is the maximum file size for merging?
Each individual PDF can be up to 200MB. Since processing happens in your browser, performance depends on your device's memory for very large files.
Will merging PDFs reduce the quality?
No, our merge tool combines PDFs without re-encoding or compressing. Your original quality, fonts, images, and formatting are preserved exactly.
Can I merge password-protected PDFs?
You'll need to unlock protected PDFs first using our Unlock PDF tool, then merge them. This ensures you have authorization to access the content.
Do I need to install any software?
No installation required. Our PDF merger works entirely in your web browser. Just visit the page and start merging immediately.