合并 PDF
免费·无需注册·文件永不离开你的设备
How to merge PDF files in 3 steps
Combine any number of PDFs into a single document without installing software or creating an account. Everything runs locally — your files stay yours.
Select your PDFs
Drag and drop two or more PDF files into the box above, or click to browse your device.
Arrange the order
Use the arrows to put files in the exact order you want them to appear in the final document.
Merge and download
Click Merge PDF. Your combined document is generated right in your browser and downloads instantly.
Why merge PDFs with AmiPDF
A privacy-first merger that works the way you expect — fast, clean, and genuinely free.
隐私优先
处理完全在你的浏览器内完成。不上传、不存储、不外传——绝不。
无需注册，无水印
无账号、无邮箱、无限制。输出文件与输入完全一致。
Lossless quality
Pages are copied as-is: text stays selectable and searchable, images keep full resolution.
任何设备可用
Windows、Mac、Linux、Android、iOS 上体验一致——无需安装。
When to merge PDF files
Anytime one document tells the story better than five. Merge scans, exports, and downloads into a single file that is easier to email, archive, sign, or print.
Because AmiPDF never uploads your documents, it is a safe choice for employment contracts, tax paperwork, medical records, IDs, and anything else you would not want sitting on a third-party server.
Merge PDFs on any platform
AmiPDF 在你的浏览器中运行——无需安装、无需配置、无需更新。
Windows
Chrome, Edge, Firefox
macOS
Safari, Chrome
Linux
Any modern browser
iOS
Safari on iPhone, iPad
Android
Chrome, Samsung Internet
Frequently asked questions
Is merging PDF files really free?
Yes. Merge PDF — like every basic AmiPDF tool — is completely free with no signup, no page limits, and no watermarks.
Are my files uploaded to a server?
No. AmiPDF merges files locally in your browser. Your documents never leave your device, which makes it safe for contracts, IDs, and other sensitive files.
How many PDFs can I merge at once?
There is no fixed file-count limit. The practical limit is your device memory — for the smoothest experience keep the combined size under roughly 200 MB per session.
Will merging reduce the quality of my PDFs?
No. Pages are copied losslessly into the new document. Text, fonts, links, and images are preserved exactly as they were in the source files.
Can I merge password-protected PDFs?
Encrypted files need to be unlocked first. Use our free Unlock PDF tool with your password, then merge the unlocked copies.
Does it work offline?
The page itself loads from the web, but once loaded, all processing is local. Your files are never transmitted while you work.
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继续——处理 PDF 所需的其他工具，全部免费、全部本地运行。