驗證簽名
驗證PDF文檔中的數字簽名。檢查證書有效性、簽名者信息和文檔完整性。
上傳已簽名的 PDF
關於此工具
驗證簽名工具允許您驗證PDF文檔中的數字簽名。檢查簽名是否有效,查看證書信息,並確認文檔完整性。
上傳已簽名的PDF,查看所有簽名、其有效性狀態、簽名者信息,以及文檔在簽名後是否被修改。
所有驗證都在瀏覽器本地進行,您的文檔永遠不會上傳到任何伺服器。
Practical guidance before you use 驗證簽名
Best for real document workflows
Use 驗證簽名 when you need a quick browser-based result without creating an account or sending routine documents through an unnecessary upload workflow. 文檔驗證 is a common example: 驗證簽名文檔是否真實且未被篡改。
Privacy and file handling
EasyPDFNex prioritizes local processing in your browser. That means supported PDF operations run on your device, not in a public cloud queue. For sensitive files, review the output before sharing it, close the browser tab after downloading, and avoid processing documents you are not authorized to edit.
Quality checks after processing
After you 導出報告, open the result and check page order, text readability, signatures, links, and form fields. If the source file is scanned, encrypted, very large, or damaged, try a related workflow such as digital sign pdf, view metadata, decrypt pdf before repeating the task.
Start with a clean source file whenever possible. For 驗證簽名, the first step is usually "上傳已簽名PDF": 上傳包含數字簽名的PDF文檔。 This simple preparation step prevents most failed exports, missing pages, and formatting surprises.
Editorial review note
This guidance is maintained by the EasyPDFNex editorial team and reviewed for practical PDF workflow accuracy. Tool pages are written to explain when a feature is useful, what to check before download, and where browser-based processing has limits.
使用方法
上傳已簽名PDF
上傳包含數字簽名的PDF文檔。
查看結果
查看文檔中找到的所有簽名及其有效性狀態。
檢查詳情
查看證書信息、簽名者詳情和簽名時間戳。
導出報告
可選下載驗證結果的JSON報告。
使用場景
文檔驗證
驗證簽名文檔是否真實且未被篡改。
合規審計
檢查簽名有效性以滿足合規和審計要求。
證書審查
查看已簽名文檔的證書詳情和到期日期。
常見問題
"有效"是什麼意思?
有效簽名意味著文檔自簽名以來未被修改,且證書鏈完整。
可以驗證多個PDF嗎?
是的,您可以上傳多個PDF並批量驗證所有簽名。
為什麼簽名可能無效?
如果文檔被修改、證書過期或證書不受信任,簽名可能無效。