PDF Validator
Verify PDF signatures
Blue "Certified" banner
Check for tampering
PDF Validator - Trust Made Visible
Drop a PDF to check who signed it, whether it’s been changed, and when. Runs in your browser; no uploads required. Works with any standards-based signed PDF.
Adobe Acrobat Trusted
ISO 32000 (PDF)
LTV-ready (RFC 3161 + OCSP/CRL)
PDF Validator - Trust Made Visible
Quick answer
Use the Validator when you need a fast answer to three questions: is this PDF signed, has it changed, and does the certificate chain look trustworthy? The check runs in the browser and works with standards-based PDF signatures, not just files sealed by Trusted Signatures.
- Best use case: verify a received PDF before you rely on it for payment, compliance, or approval.
- What it checks: signature integrity, certificate trust status, and timestamp evidence.
- What it does not require: account setup, file upload, or a Trusted Signatures-issued seal.
What should I see?
In our Validator, Adobe Acrobat/Reader and any PAdES-compliant reader, recipients see a blue “Certified” banner for authentic, unchanged files.
Frequently Asked Questions
Is this the same as Adobe Acrobat validation?
It checks the same standards signals Acrobat/Reader use for signed PDFs (ISO 32000/PDF; PAdES behaviors). Results may vary based on local trust stores
Does the Validator work with non-Trusted Signatures seals?
Yes. It validates any standards-based PDF signature, including those not sealed by Trusted Signatures.
Is it free?
Yes, our web Validator is free. If you are interested in automating validation checks in your workflows using CLI, API, Web sealing, Zapier, or Documenso integrations, contact us to learn more about our Validator roadmap.
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Frequently Asked Questions
My critical documents show no signature. How can I secure my documents so I can quickly see fakes or fraud attempts?
We designed Publisher - Trusted PDF Sealing to remove the barriers most organizations have to securing documents: the expense and complication of managing certificates (organizational verifications), PKI management and security. This is the most affordable, easiest to implement solution on the market. Add Publisher Identity and your organization’s name appears in the Certified banner so your recipients can trust what you send them came from you, unaltered.