合并PDF
在线免费合并PDF文件，将多个PDF合并为一个文档。文件保留在设备上。
选择 2 个或更多 PDF 文件进行合并
Frequently Asked Questions
How do I combine multiple PDFs into one?
Open our Merge PDF tool, upload all your PDF files, drag to reorder them, and click Merge. The combined PDF downloads instantly. Everything happens in your browser — no uploads to any server.
Can I merge PDFs without installing software?
Yes, our tool works entirely in your browser. No downloads, no installations, no accounts needed. It works on Windows, Mac, Linux, and mobile devices.
Is there a limit to how many PDFs I can merge?
No hard limit — the only constraint is your browser's memory. Most users can comfortably merge 20-30 PDFs at once. For very large documents, try merging in batches.
Are my PDF files secure during merging?
Absolutely. Your PDFs never leave your device. Unlike other "free" PDF tools that upload your documents to their servers, our tool processes everything locally in your browser.