PDF 合併工具
將多個 PDF 檔案合併為一份文件。免費、瀏覽器端運作、無需上傳 — 您的檔案保持私密。
Local processingSelect 2 or more PDF files. All processing happens in your browser — files are never uploaded.
What is PDF 合併工具?
A PDF merger combines multiple PDF files into a single document, concatenating pages in the chosen order. This is useful for assembling reports from chapters, combining scanned pages, or joining signed contracts with attachments. The merged PDF preserves each source's pages, bookmarks, and form fields where possible. Processing happens in the browser so confidential documents are not uploaded.
How It Works
Each input PDF is parsed client-side into its page tree and resource dictionary. The merger constructs a new PDF document, importing page objects from each source in sequence and rewriting cross-reference entries to point at the new structure. Page rotation, size, and embedded resources (fonts, images) are carried over. The output is serialized as a fresh PDF with a rebuilt xref table. All work is local.
Common Use Cases
- Assembling multi-chapter reports — merge separate section PDFs into one deliverable
- Combining scanned pages — join individually scanned sheets into a single document
- Appending supporting material — add exhibits or cover sheets to a main contract
- Creating course packs — merge syllabus, readings, and assignments for students
Technical Details
Engine: client-side JavaScript PDF library. Page order follows the input sequence (drag to reorder). Bookmarks and form fields from source PDFs are preserved where the library supports them; interactive form AcroForm merging can be limited. Encrypted PDFs require their passwords. Output is a standard PDF 1.4+ file. No content is uploaded.
How to Use
Enter your input above. The result updates automatically. Use the copy button to copy the result.
Privacy
All processing happens in your browser. Your data is never uploaded to any server.
FAQ
這個 PDF 合併工具免費嗎？
是的，完全免費。無需註冊。
這個工具會上傳我的資料嗎？
不會。所有處理都在瀏覽器中本機完成。您的資料永遠不會離開您的裝置。