Permissions are advisory, not encryption-grade; hostile tools can strip them.

Set PDF Owner Password (permissions)

Restrict editing/copying without blocking casual opening.

Add an owner password to a PDF to restrict editing/copying instantly. Free PDF permission restrictor.

About Owner Password

Restrict editing/copying without blocking casual opening.

Sets an owner password (which readers use for permission changes) and optionally a user password (needed just to open). Restrictions can be stripped by any tool with the owner password.

Where it is used

Sending drafts that should print but not be edited, watermark-replaceable contracts.

How to use the Owner Password

PDF File — select a file (application/pdf,.pdf) — Up to 50 MB. File never leaves your browser..
Owner Password (permits opening, blocks restrictions) — enter the value (e.g. Choose a password).
User Password (opening, optional) — enter the value (e.g. Leave blank to open without password).
Calculate — press the Calculate button to see the result instantly above.

Formula

pdf-lib encrypt with owner + optional user password and permissions mask.

Examples

Owner-only

ownerPwd:secret

userPwd:

Result: Opens freely; editing blocked

Frequently Asked Questions

Security?: Permissions are advisory, not encryption-grade; hostile tools can strip them.

Calculator Inputs