跳转到主要内容

合并PDF

将多个PDF文件合并成一个文档。免费在线PDF合并器，支持拖放重新排序。

上传PDF文件

拖放PDF文件到此处，或点击浏览。可以添加多个文件。
Files: 100

开发者 API

可通过 API 调用

使用 PDF Tools API 自动化此 PDF 工作流。每次成功请求消耗 1 Credit，处理失败会自动退还。

/api/external/pdf-tools/merge-pdf每次成功请求 1 Credit输出：result.pdf
API 文档获取 API Key
curl -X POST https://itextmaster.com/api/external/pdf-tools/merge-pdf \
  -H 'x-api-key: YOUR_API_KEY' \
  -F 'files=@a.pdf;type=application/pdf' \
  -F 'files=@b.pdf;type=application/pdf' \
  -F 'options={}' \
  --output result.pdf

关于此工具

合并PDF允许您快速轻松地将多个PDF文档合并成一个文件。无论您是整合报告、合并扫描文档还是组装演示文稿，这个工具都能使过程变得无缝。

只需上传文件，使用拖放功能按所需顺序排列，然后将它们合并成一个连贯的文档。该工具保留原始文件的质量，并可选择保留每个源文档的书签。

所有合并操作都在您的浏览器本地进行，确保敏感文档的完全隐私。

如何使用

  1. 上传PDF文件

    将多个PDF文件拖放到上传区域，或点击从设备中选择文件。

  2. 排列顺序

    拖放文件缩略图以按所需顺序排列。

  3. 合并并下载

    点击合并按钮组合所有文件，然后下载合并后的PDF。

使用场景

合并报告

将月度或季度报告合并成一个年度文档，便于分发和存档。

组装作品集

将多个项目文档、证书或工作样本合并成专业作品集。

整合发票

将多张发票或收据合并成一个文档，用于会计和记录保存。

Practical guide

Why choose local processing?

  • PDF collections can contain contracts, invoices, identity details, or internal business information, so keeping processing in the browser reduces exposure.
  • The website tool is free to use with no usage limits and does not require sign-in.
  • Local processing also keeps iteration fast: adjust options, preview the result, and export a single ordered PDF without waiting for an upload queue.

Best files for this tool

  • Best for PDF files that open correctly in a modern browser and are not intentionally damaged or restricted.
  • Works well for everyday business, school, legal, finance, and personal documents where you need a single ordered PDF.
  • For very large files, close unused tabs and process one batch at a time so the browser has enough memory.

Common limitations

  • Encrypted or permission-restricted PDFs may need to be unlocked before processing.
  • Scanned pages, unusual fonts, complex layers, and damaged files can reduce accuracy or processing speed.
  • Browser memory and device performance matter more for local tools than for upload-based services.

Local processing vs upload-based tools

  • Local tools keep routine website processing on your device, while upload-based tools send files to a remote server.
  • Upload-based services can move heavy work off your computer, but they add transfer time and require trusting a server with your files.
  • Use the API when you intentionally need server-side automation; use the website when you want private manual processing.

What to do if processing fails

  • Try a smaller file, a shorter page range, or one file at a time if the browser runs out of memory.
  • If a PDF is encrypted, damaged, or restricted, unlock or repair it first and then retry the workflow.
  • If the output looks wrong, check whether the source file uses scans, complex transparency, form fields, or unsupported embedded objects.

API automation

Automate combine multiple documents with the PDF Tools API. Each successful request uses 1 Credit, and every signed-in user receives 100 free API Credits each month.

View API automation docsCreate API Key

常见问题

可以合并多少个PDF？

您可以一次合并最多100个PDF文件，总大小最高可达500MB。

合并后的PDF会保持原始质量吗？

是的，合并过程保留所有文档的原始质量，不会进行任何压缩或质量损失。

可以合并受密码保护的PDF吗？

受密码保护的PDF需要先解密。请使用我们的解密PDF工具在合并前移除密码。

您可能还喜欢

拆分PDF整理与管理
整理PDF整理与管理
交替合并整理与管理