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線上签署PDF

为PDF文件新增电子签名。绘制、输入或上傳您的签名。

上傳PDF檔案

拖放PDF檔案到此處進行簽名。

關於此工具

签署PDF允许您快速安全地为PDF文件新增电子签名。通过绘制、输入或上傳影像建立您的签名，然后将其放置在文件的任何位置。

您可以在单个文件中新增多个签名，精确调整大小和位置，并保存签名以供将来使用。该工具非常适合合同、协议、表單和任何需要签名的文件。

所有签名操作都在您的瀏覽器本機进行，确保您的文件和签名保持私密。

使用方法

  1. 上傳PDF檔案

    拖放您的PDF檔案或點選選擇需要签名的文件。

  2. 建立签名

    用鼠标或触摸绘制签名，输入姓名生成签名，或上傳签名影像。

  3. 放置和调整

    點選文件放置签名，然后拖动定位和调整大小。

  4. 保存并下載

    點選保存应用签名并下載已签名的PDF。

使用場景

合同签署

电子签署合同和协议，无需打印和掃描。

表單填写

为申请表、同意书和官方文件新增签名。

审批流程

作为审阅和审批流程的一部分签署文件。

Practical guide

Why choose local processing?

  • Forms and agreements 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 signed 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 signed 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

Use API docs to plan automated PDF workflows. If this exact website workflow is not exposed as an endpoint yet, you can still use available PDF API tools and Credits for supported operations.

View API automation docsCreate API Key

常見問題

电子签名具有法律效力吗？

电子签名在大多数国家都被法律认可。但是，某些文件可能需要特定类型的数字签名。请查阅当地法规。

可以保存签名以供将来使用吗？

是的，您可以将签名保存到瀏覽器的本機存储中，以便在签署未来文件时快速访问。

可以在一个文件中新增多个签名吗？

是的，您可以新增任意数量的签名，在任何頁面上独立定位每个签名。

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