合并 PDF
将多个 PDF 文件合并为一个文档。只需上传你的 PDF 文件，按需排列顺序，然后下载合并结果。所有处理都在你的浏览器本地完成 — 文件永远不会离开你的设备。
Preparing the local PDF workspace
The instructions, FAQ, privacy notes, and related tools are already available while the browser-only editor initializes.
Practical guide for 合并 PDF
Example use case
Combine a signed contract, invoice, and appendix into one PDF before sending it to a client or uploading it to a portal.
Settings explained
- File order controls the page order in the final merged PDF.
- Page orientation and page size are preserved from each source file.
- Encrypted PDFs may need to be unlocked before they can be merged.
Limitations
- Very large PDF sets depend on available browser memory.
- Files with advanced forms or signatures may lose interactive behavior after merging.
- Password-protected files must be unlocked before local processing can read them.
Troubleshooting
- If pages appear in the wrong order, reorder files before merging again.
- If a file fails, try unlocking or repairing that PDF first.
- If the browser slows down, merge fewer large files at a time.
使用步骤
Upload PDFs
Select two or more PDF files from your device.
Arrange order
Drag files into the exact order you want them to appear in the final document.
Merge locally
Combine the files in your browser and download the merged PDF.
常见问题
Can I merge PDFs without uploading them?
Yes. The merge workflow runs in your browser for supported PDF files.
Will bookmarks or forms be preserved?
Basic pages are preserved. Advanced bookmarks, forms, or signatures may not behave the same after merging.
这个工具免费吗？
是的，这个工具完全免费使用。无需注册、没有限制、也无任何隐藏费用。所有处理均在浏览器中本地完成 — 绝不会上传任何内容。
我的文件安全吗？
你的文件永远不会离开你的设备。所有处理均在你的浏览器中使用客户端 JavaScript 本地完成。文件永远不会上传到任何服务器，你的隐私得到完全保护。
需要注册账号吗？
无需注册。你可以立即使用此工具，无需创建账号或提供任何个人信息。