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Verify PDF digital signatures — integrity, certificate chain, trust, timestamp, revocation & LTV. Supports global CAs. Verify PDF digital signatures directly in your browser — no server uploads, no external services. Everything runs locally for maximum privacy. 在瀏覽器中直接驗證 PDF 數位簽章 — 無需上傳檔案、無需外部服務。所有驗證皆在本機執行,確保最高隱私安全。
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