驗證 PDF 數位簽章

驗證 PDF 檔案中的數位簽章。檢查憑證有效性、查看簽署者詳細資料並確認文件完整性。所有處理都在瀏覽器中進行。

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PDF 文件

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使用方式

1

Upload Your PDF

Select a digitally signed PDF file from your device

2

Automatic Analysis

The tool extracts and parses all digital signatures in the document

3

View Results

See signer information, certificate validity, and signature status

相關 PDF 工具

Digital Signature

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View Metadata

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常見問題

What types of signatures can be validated?

This tool validates PKCS#7 digital signatures created with X.509 certificates, the standard format used by most PDF signing tools and certificate authorities.

What does "Self-Signed Certificate" mean?

A self-signed certificate is one where the issuer and subject are the same. While the signature is technically valid, it means the certificate wasn't issued by a trusted Certificate Authority (CA).

Is my PDF uploaded to a server?

No, all processing happens entirely in your browser. Your PDF files never leave your device, ensuring complete privacy and security.