How to Certify PDF Online
Step-by-step instructions to certify a pdf with a digital certificate with ZiaSign.
Why this workflow matters
ZiaSign's PDF certification tool applies a digital certificate that controls what modifications are allowed after certification. Choose no changes, form-fill only, or annotations only. Stronger than standard digital signatures.
Step by step
Certify PDF is one of the fastest ways to certify a pdf with a digital certificate. Enterprise access gives you the full workflow.
- 1
Upload your PDF
- 2
Select certification level
- 3
Apply certificate
- 4
Download the certified PDF
Frequently asked questions
What's the difference between signing and certifying?
Certification sets the allowed change level (no changes, form fill only, or annotations). Signing just proves identity.
What certification levels are available?
Three levels: no changes allowed, form filling and signing only, or form filling, signing, and annotations.
Can a certified PDF be modified?
Only within the allowed change level. Changes beyond the permitted level invalidate the certification.
Is certification stronger than a digital signature?
Yes. Certification controls what changes are permitted and prevents unauthorized modifications. Standard signatures only prove identity.
More specific workflows for this tool
Related guides
How to Add Signature Field Online
Step-by-step instructions to add empty digital signature fields to a pdf for recipients to sign with ZiaSign.
Read guideHow to Add Timestamp Online
Step-by-step instructions to add a trusted timestamp to a pdf document with ZiaSign.
Read guideHow to Remove Signatures Online
Step-by-step instructions to remove all digital signatures from a pdf with ZiaSign.
Read guideReady to run the actual workflow?
You have the steps. Open the tool, process the file, and then move into the next recommendation if the document still needs cleanup, protection, or conversion.