I’m preparing a secure, locked copy of the budget approval package so only execs can view final figures. Tell me what …
Open the PDF file you want to restrict in Adobe Acrobat Pro.
Select File from the top menu, then choose Properties.
In the Document Properties window, click the Security tab.
From the Security Method dropdown, select Password Security.
In the Password Security Settings dialog, check the option to restrict editing and printing of the document.
Set a permissions password when prompted.
CautionIf you forget this password, you cannot change or remove the restrictions later.
Choose the specific restrictions you want to apply (e.g., disallow printing, disallow editing, disallow copying).
Click OK to confirm your settings and close the dialog.
Click OK again in the Document Properties window.
Save the PDF to apply the new permissions.
Best practiceTest your restricted PDF in a different PDF reader or with a different user account to confirm the permissions are enforced.
You can review or change these restrictions later by reopening the Document Properties and returning to the Security tab.
This runs in the Acrobat app - there is no separate API for this task.
An owner password is a special password that gives full control over a PDF's security settings. It matters because without it, you cannot change or remove any restrictions you set, like stopping printing or editing. If you lose this password, your document's restrictions are permanent, and you cannot unlock it yourself. Always keep it safe.
Yes, even if 'Changes Allowed: None' is set, people can still fill out form fields in a PDF. The 'Changes Allowed' setting only stops actions like inserting, deleting, rotating pages, or extracting content. Filling out forms is usually a separate permission. If you need to stop form filling, you would need to flatten the form first.
You would choose 'Low (150 dpi)' for printing if you want to allow people to print a document, but only in a low-quality version. This is useful for drafts or for sharing information where you don't want high-quality copies to be made or used for official purposes. 'None' stops all printing, while 'Low' allows a basic, less clear print. It's a balance between full restriction and some usability.
No, you cannot remove PDF restrictions without the owner password. The owner password is the key to changing or removing any security settings applied to the document. If you do not have it, the restrictions are permanent. You would need to get the password from the person who set the restrictions.