跳轉到主要內容

線上合併PDF

将多个PDF檔案合併成一个文件。免費線上PDF合併器，支援拖放重新排序。

上傳PDF檔案

拖放PDF檔案到此處，或點選瀏覽。可以新增多個檔案。
Files: 100

開發者 API

可透過 API 呼叫

使用 PDF Tools API 自動化此 PDF 工作流程。每次成功請求消耗 1 Credit，處理失敗會自動退還。

/api/external/pdf-tools/merge-pdf每次成功請求 1 Credit輸出：result.pdf
API取得 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

關於此工具

合併PDF允许您快速轻松地将多个PDF文件合併成一个檔案。无论您是整合报告、合併掃描文件还是组装演示文稿，这个工具都能使过程变得无缝。

只需上傳檔案，使用拖放功能按所需顺序排列，然后将它们合併成一个连贯的文件。该工具保留原始檔案的品質，并可選擇保留每个源文件的書籤。

所有合併操作都在您的瀏覽器本機进行，确保敏感文件的完全隐私。

使用方法

  1. 上傳PDF檔案

    将多个PDF檔案拖放到上傳区域，或點選从设备中選擇檔案。

  2. 排列顺序

    拖放檔案缩略图以按所需顺序排列。

  3. 合併并下載

    點選合併按钮组合所有檔案，然后下載合併后的PDF。

使用場景

合併报告

将月度或季度报告合併成一个年度文件，便于分发和存档。

组装作品集

将多个项目文件、证书或工作样本合併成专业作品集。

整合发票

将多张发票或收据合併成一个文件，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

常見問題

可以合併多少个PDF？

您可以一次合併最多100个PDF檔案，总大小最高可达500MB。

合併后的PDF会保持原始品質吗？

是的，合併过程保留所有文件的原始品質，不会进行任何壓縮或品質损失。

可以合併受密码保护的PDF吗？

受密码保护的PDF需要先解密。请使用我们的解密PDF工具在合併前移除密码。

相關工具

分割PDF整理與管理
整理PDF整理與管理
交替合併整理與管理