PDF署名を検証する

PDFファイルのデジタル署名を検証します。証明書の有効性を確認、署名者の詳細を表示し、文書の整合性を確認します。すべての処理はブラウザ内で行われます。

クリックしてファイルを選択します またはドラッグ&ドロップ

PDFドキュメント

ファイルがデバイスの外に出ることはありません。

仕組み

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

関連するPDFツール

Digital Signature

Add cryptographic signature

PDFの暗号化

Password protect PDF

メタデータの表示

Inspect PDF properties

よくある質問

Is Signature Validation really free?

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

How does signature validation work?

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).

Are my files secure and private?

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