Encrypt PDF

POST /api/pdf-encrypt

Password-protect a PDF. Set a user password (open document) and optionally a separate owner password (change permissions). Restrict printing, modifying, or copying.

Returns a new PDF that requires the supplied user password to open and applies the requested permission restrictions when opened with that password. Two passwords are supported: - `userPassword` (required) — what an end-user types to view the document. - `ownerPassword` (optional) — privileged credential that can change permissions and remove encryption. Defaults to the user password if omitted, but supplying a distinct owner password is the standard pattern for redistributable PDFs. Permissions default to fully permissive; pass `false` for any of `allowPrinting` / `allowModifying` / `allowCopying` to lock that capability behind the owner password. PDF permission bits are advisory — most viewers honour them but they are not strictly enforced.

Inputs

Name	Type	Default	Description
pdf*	file	—	Base64-encoded source PDF to encrypt.
userPassword*	string	—	Password the end-user types to open the document. 1–256 chars.
ownerPassword	string	—	Owner password for permission management. Defaults to the user password if omitted. 0–256 chars.
allowPrinting	boolean	true	Allow printing when opened with the user password. Default: true.
allowModifying	boolean	true	Allow modifying / annotating / form-filling. Default: true.
allowCopying	boolean	true	Allow text / image copy-out. Default: true.
ignoreEncryption	boolean	—	Re-encrypt an already-encrypted source. Default: false (encrypted input is rejected).

Response

Modes: binary, json. Cache: yes (24h TTL).