Validate Signature

Verify the digital signatures in a PDF document directly in your browser. Check whether signatures are valid, whether the document has been tampered with since signing, and review certificate details including issuer, expiration date, and trust chain. This is essential for legal professionals receiving signed contracts, procurement teams validating vendor submissions, and compliance officers verifying certified documents. The validation runs entirely locally via WebAssembly, so the signed documents you are checking never leave your device.

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