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
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.
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, Zapier or Documenso integrations) contact us to learn more about our Validator product roadmap.
Get notified about Validator updates
Building automated PDF validation into your workflow? Get early access to our integrations—plus exclusive launch pricing.
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.