合併 PDF
免費·無需註冊·檔案永不離開你的裝置
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.
隱私優先
處理完全在你的瀏覽器內完成。不上傳、不儲存、不外傳——絕不。
無需註冊，無浮水印
無賬號、無郵箱、無限制。輸出檔案與輸入完全一致。
Lossless quality
Pages are copied as-is: text stays selectable and searchable, images keep full resolution.
任何裝置可用
Windows、Mac、Linux、Android、iOS 上體驗一致——無需安裝。
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 在你的瀏覽器中執行——無需安裝、無需配置、無需更新。
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.
相關 PDF 工具
繼續——處理 PDF 所需的其他工具，全部免費、全部本地執行。