Merge PDF Files Online — Free
Combine multiple PDF files into one document. Drag and drop to reorder pages.
合并文件
将文件拖放至此或点击浏览
选择多个 PDF 文件进行合并
200万+文件已转换
数千用户的信赖之选
安全传输
HTTPS 加密上传
隐私优先
文件处理后自动删除
无需注册
即刻开始转换
随处可用
任何浏览器,任何设备
如何转换
Upload multiple PDF files by dragging them into the upload area.
Drag and drop to reorder the files as needed.
Click Merge and download your combined PDF.
About Merge PDF
Merging PDF files is a fundamental document management task that saves time and improves organization. Whether you're combining invoice pages, assembling a multi-chapter report, or creating a unified portfolio from separate files, our PDF merger handles the task seamlessly while preserving all formatting, hyperlinks, and document properties.
Our merge tool accepts multiple PDF files simultaneously and allows you to arrange them in your preferred order before combining. The drag-and-drop interface makes reordering intuitive, so you can quickly organize chapters, sections, or pages exactly how you need them. The resulting merged PDF maintains the original quality of each source document with no degradation or conversion artifacts.
Business professionals use PDF merging to compile meeting materials, combine signed contracts with attachments, or assemble comprehensive proposal packages. Legal teams merge case documents, evidence files, and correspondence into unified case files. Accountants combine monthly statements, receipts, and reports into organized financial records. Students merge lecture notes, research papers, and assignment submissions.
The merge process preserves important document elements including bookmarks, table of contents links, form fields, and digital signatures. Page numbering can be maintained from original documents or reset for the combined file. Our engine handles PDFs with different page sizes, orientations, and security settings, automatically optimizing the output for compatibility.
Common Use Cases
- •Combine multiple invoice or receipt pages into a single document
- •Merge chapters or sections into a complete book or report
- •Assemble portfolio pieces from separate files
- •Combine signed documents with their attachments
- •Create comprehensive proposal packages from multiple source files
How It Works
Our PDF merger uses PDFtk, a robust command-line tool for PDF manipulation. It performs page-level concatenation while preserving document structure, embedded fonts, and interactive elements. The process is lossless and maintains full compatibility with PDF readers and editors.