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Sáp nhập PDF trực tuyến miễn phí

Combine multiple PDF files into one document in seconds. No installation required. Merge PDFs directly in your browser for free.

Drop PDF files here
Upload 2 or more PDF files to merge

Kích thước tệp tối đa 10 MB. Đăng ký để biết thêm.

How to Merge PDFs Online

Upload files, set order, and export one clean PDF in seconds.

Upload PDF Files

Drag and drop or browse your device to add 2 or more PDFs.

Arrange File Order

Move files up or down using drag and drop to set the final sequence.

Merge and Download

Tạo một bản PDF kết hợp và tải xuống ngay lập tức.

Why Choose Our PDF Merger

Xử lý nhanh

Merge multiple files quickly with optimized server-side processing.

Sắp xếp lại dễ dàng

Set file order exactly how you want before creating the final document.

Flexible Plans

No watermarks. Batch and size limits follow your active plan.

Preview Before Merge

Review file thumbnails before exporting to avoid ordering mistakes.

Encrypted & Auto-Deleted

PDFs are uploaded over HTTPS and automatically deleted after you download the merged result. No documents are stored or shared.

Any Device Support

Merge from desktop, tablet, or mobile without extra software.

PDF Merger FAQ

Quick answers about merging multiple PDF files, page ordering, quality preservation, and file size limits.

How do I merge PDF files online?

Upload two or more PDF files using drag-and-drop or the file browser. Reorder them by dragging thumbnails into the sequence you want. Click Merge and download the combined PDF — the entire process takes seconds.

Is there a limit on how many PDFs I can merge?

Người dùng miễn phí có thể hợp nhất các tệp có tổng dung lượng lên tới 10 MB. Gói trả phí hỗ trợ lên tới 500 MB và số lượng tệp không giới hạn. Không có giới hạn cứng về số lượng tệp riêng lẻ mà bạn có thể kết hợp trong một lần hợp nhất.

Will merging PDFs change the quality or layout?

No. Merging is a lossless operation that concatenates pages without re-encoding. Text, images, fonts, links, bookmarks, and form fields are preserved exactly as they appear in the originals.

Can I rearrange the page order before merging?

Yes. After uploading, drag and drop file thumbnails to set the order. The final merged PDF follows your custom sequence from top to bottom.

Can I merge password-protected PDFs?

PDFs with a user password (open password) need to be unlocked before uploading. PDFs with only an owner password (edit restriction) can usually be merged without issues.

Does the merged PDF keep bookmarks and links?

Yes. Internal links, bookmarks, and table-of-contents entries from each source PDF are carried over into the merged document so navigation still works.

Dữ liệu của tôi có được bảo mật trong quá trình hợp nhất không?

All files are uploaded over an encrypted HTTPS connection. Processing happens on our server and files are automatically deleted after the merge completes. We never access, store, or share your documents.

Do I need to install any software?

No. The merger runs entirely in your browser and works on Windows, Mac, Linux, Chromebook, and mobile devices. No plugins or desktop software required.

Can I merge PDFs on my phone?

Yes. The tool is fully responsive and works on iPhone, Android, and tablet browsers. Upload files from your device, reorder them, merge, and download — all from the mobile browser.

What file formats can I merge?

This tool accepts PDF files only. If you need to combine images or Word documents into a PDF, convert them to PDF first using our converter tools, then merge the resulting PDFs here.

Related Tools

Khám phá thêm các công cụ miễn phí trên iFormat.io

Tách PDF

Split a PDF into multiple files or extract specific page ranges.
Compress PDF

Reduce the file size of your merged PDF without losing quality.
Rotate PDF Pages

Sửa hướng trang trước khi hợp nhất các tài liệu được quét.
Ký điện tử PDF

Sign the combined document electronically — draw, type, or upload a signature.
Add Page Numbers

Number pages after merging for professional document navigation.
Trích xuất trang PDF

Pull out specific pages from a PDF before or after combining files.