Remove PDF Restrictions

A PDF can carry two different passwords, and confusing them is the usual source of frustration.

A user password is required to open the file at all. Without it the contents are unreadable, and no tool can help you, which is exactly as it should be. If your file asks for a password before it will show you a page, this is not the tool you need: the PDF unlock tool takes the password you know and removes it.

An owner password is different. The file opens for anyone, because the key is inside the document. The owner password only guards the permission settings, such as printing and copying. This tool handles that second case, and only that one.

This follows from how the format works, not from any weakness being exploited. To display a restricted PDF, a reader must decrypt it, and it must be able to do so without asking anyone for anything. The key is therefore derivable from the file by any conforming reader.

The permission flags were never a lock. They are an honour-system request, and a reader that obeys them is choosing to. This tool simply writes out the decrypted document that your reader had access to all along, with the request removed.

An ordinary, unencrypted PDF that prints, copies and edits like any other, and that still contains exactly the same pages. Nothing is rasterized or recompressed, so text stays selectable and searchable.

If you want to set restrictions rather than remove them, the PDF permissions tool goes the other way, and the PDF protect tool adds a real password.