We keep fighting ad-hoc edits to critical forms because permissions were set too loosely. Across recurring incidents, …
Open the PDF file you want to restrict in Adobe Acrobat.
Select Tools from the main menu.
Choose Protect from the list of available tools.
Click Restrict Editing under the Permissions section.
When prompted, set a permissions password to prevent others from changing these restrictions.
In the permissions dialog, uncheck options for printing, editing, and copying as desired to make the PDF read-only.
Click OK to apply the restrictions.
Save the PDF file to ensure the new permissions are in effect.
Best practiceIf you want to prevent users from removing these restrictions, choose a strong, unique permissions password and do not share it.
After applying restrictions, test the PDF by reopening it to confirm that editing and printing are disabled.
This runs in the Acrobat app - there is no separate API for this task.
| Setting | What it controls | Options |
|---|---|---|
| Changes Allowed | What edits can be made to the PDF content and structure. | Insert/delete/rotate pages, form fill, page extract. |
| Printing Allowed | Whether the document can be printed and at what quality. | None, Low (150 dpi), High. |
An owner password is very important because it locks the security settings of your PDF. Without it, anyone could change the restrictions you set. If you want to later remove or change the permissions, you will need this password. It ensures only authorized users can modify the document's security.
Yes, if you restrict editing, people can still fill out forms in the PDF. The 'Changes Allowed' setting specifically mentions 'form fill' as an option. You can choose to allow form filling even while restricting other types of edits like inserting or deleting pages.
'Restrict Privileged Access' means you are limiting who has special rights to your PDF. For example, you can prevent certain users from making changes, printing at high quality, or extracting pages. It's about giving different levels of access, so only specific people can do sensitive actions with the document, protecting its integrity and confidentiality.