Product

Protect PDFs

Use POST /v1/pdf/protect to password-lock an existing PDF. To remove a password, use POST /v1/pdf/unlock.

Set userPassword and optional ownerPassword. Output remains standard PDF.

Request JSON

{
  "file": "JVBERi0xLjc...",
  "userPassword": "secret",
  "ownerPassword": "owner-secret",
  "filename": "locked.pdf"
}