Verify a signed PDF without installing anything
Sometimes you just need to know, quickly, whether a signed PDF is genuine. Maybe a client sent a countersigned contract, a candidate submitted a signed offer letter, or you downloaded an Aadhaar or GST certificate. Instead of opening desktop software and configuring trust settings, you can verify the signed PDF online in seconds. Drop the file into the box above and read the result.
Why "online" doesn't have to mean "uploaded"
Most online tools that "verify" a PDF actually upload it to a server first. For a signed document, something you're checking precisely because it matters, that's a privacy risk you don't need to take. This tool is genuinely online but never uploads your file. The verification engine runs inside your browser using the built-in WebCrypto API, so your PDF stays on your device. You get the convenience of a web tool with the privacy of an offline one, and you can confirm there's no upload in your browser's network inspector.
What you'll see
- Overall status: Valid, Warning, or Invalid, with a plain-language summary.
- Document integrity: whether the file changed after it was signed.
- Signature check: whether each signature verifies cryptographically.
- Signer & certificate: name, organization, issuer, serial, validity, and algorithms.
- Trust chain: Trusted, Untrusted, or Unknown, with revocation endpoints.
Works on desktop and mobile
Because it's browser-based, you can verify a signed PDF on a laptop or directly on your phone, no app required. That's handy when a document arrives by email or messaging app and you want to check it before acting on it.
Aadhaar, GST and government PDFs
The verifier handles any PDF with a standard digital signature, including Indian government documents. Aadhaar PDFs commonly show a question mark in Adobe because of a trust-store quirk, not because they're fake. Our Aadhaar signature validator detects the UIDAI signer and trusts the official CCA India root so genuine Aadhaar files read as valid. If the PDF is still password-protected, you can remove the password first, in your browser.
Keep a record
After verifying, download a report as a PDF or JSON for your records or to share. It captures the overall status and the signer and certificate details exactly as they were when you checked. To understand the results in more depth, see how to check a PDF signature and what a digital signature is.