PDF 合并工具
免费的 PDF 合并工具。按自定义顺序合并任意数量的 PDF。所有处理都在您的浏览器中本地进行——文件绝不会离开您的设备。
Runs in your browserUpdated Apr 26, 2026
Settings
Drop PDFs or click to browse
Drop multiple PDFs in the order you want them
Up to 50 MB · processed locally in your browser
Result
Merged file will appear here.
常见问题
›Are my PDFs uploaded?
No — merging happens entirely in your browser via pdf-lib. Your files never leave your device.
›Is there a file count or size limit?
Limited only by your browser's memory. Most laptops handle dozens of multi-megabyte PDFs without issue.
›Does it preserve bookmarks and metadata?
Yes — bookmarks, links and document metadata from the source PDFs are preserved in the merged file.
›Can I reorder the PDFs?
Yes — drag to reorder before merging. The merged PDF follows your chosen order.
›Is the merger free?
Yes — fully free, no signup, no file count limits.