PDF 合并
UpBox优盒工具箱，免费 PDF 合并工具，多个 PDF 可调整顺序后合成一个文件，浏览器本地处理，文件不会上传。
无需注册 · 数据不上传No sign-up · nothing uploaded
选择 PDFChoose PDFs
- 选择两个以上 PDF 后即可合并
合并结果Result
文件数0
总页数—
总大小—
输出大小—
选择两个以上 PDF 后即可合并
本工具所有运算在本地浏览器完成，你的文件、文本不会上传到服务器
工具介绍
PDF 合并在浏览器里完成：一次选好多个 PDF，按列表顺序检查、上下调整，再合并成一个文件下载。文件不上传，也没有网络请求。 Merging happens in your browser: select several PDFs, check and reorder them in the list, then merge into one downloadable file. Nothing is uploaded and no request is made.
适合把合同附件拼成一份、把扫描页合并成完整文档，或把拆分过的报告重新组装；页数、总大小和输出体积都会实时显示，方便先确认再下载。 Useful for combining contract annexes, joining scanned pages into one document, or reassembling a split report. Page count, total size and output size are shown before you download.
- 本地合并不上传Runs locally, no upload
- 一次选多个 PDFAdd several PDFs at once
- 可上下调整顺序Reorder before merging
- 显示页数与输出体积Page and size summary
- 支持拖拽添加Drag and drop supported
使用说明
- 点上传区选择 PDF，或直接把文件拖进来，可一次选多个。Choose PDFs in the drop area or drag them in; multiple files at once are fine.
- 在列表里用上下箭头调整先后顺序，点叉号可移除不需要的文件。Reorder with the arrows, and remove unwanted files with the cross.
- 确认总页数、总大小无误后点“合并 PDF”。Check the page and size summary, then press Merge PDFs.
- 合并完成后点“下载合并结果”保存到本地。Download the merged PDF once it is ready.
常见问题
文件会上传吗？Are my files uploaded?
不会。PDF 读取、页面复制和写出全部在当前页面完成；合并结束后关掉页面即可释放内存。No. Reading, copying pages and writing all happen in this page, and memory is released when you close it.
加密或有密码的 PDF 能合并吗？Can encrypted PDFs be merged?
不能。需要先解除密码再合并，页面会给出提示。No. Remove the password first; the page will tell you when it hits one.
合并后顺序可以改吗？Can I change the order?
可以。合并前在列表里用上下箭头调整，列表里的编号就是最终页面顺序。Yes. Use the arrows before merging; the numbering in the list is the final page order.
会损失画质或书签吗？Does quality or bookmarks get lost?
页面内容按原样复制，不重新压缩画面；但原文件里的书签、表单和部分交互信息不会带入新文件。Pages are copied as-is without recompression, but bookmarks, forms and some interactive data from the originals are not carried over.