Unlock PDF

Remove a PDF Password or Its Restrictions

PDFs carry two different kinds of lock, and people routinely confuse them. This tool handles both, but what it can do for you depends entirely on which one you are looking at.

Two locks, one file

The open password — the user password, in the specification's language — encrypts the document. Without it, no reader can display anything. Removing it requires the password. There is no way around that, here or anywhere, and any site claiming otherwise is either lying or running a very slow guess.

The restrictions — the owner password — are different. The file is encrypted with an empty user password, so it opens for anyone, but flags in it tell readers to disable printing, copying text or editing. Those flags are advisory. The decryption key is already available to every reader that opens the file; the restrictions rely on the reader agreeing to enforce them.

So restriction removal needs no password at all. That is not a security bypass — it is what the format actually specifies.

What happens when you upload

The tool tries an empty user password first. If the file opens that way, it is a restrictions-only file and it is decrypted and rewritten immediately without asking you for anything.

If it does not open, the file has an open password and you are prompted for it. Enter it and the same thing happens.

Either way the output is a plain, unencrypted PDF with no restrictions attached.

The three answers you can get

Decrypted with your password. The file had an open password, you supplied it, and the result is unencrypted.

Restrictions removed without a password. The file had print or copy locks and no open password. Those are gone.

Nothing to do. The file was not encrypted in the first place. This happens more often than you would expect — people assume a PDF is locked because a reader is being awkward about a form field, or because the file is flagged read-only by the operating system, which has nothing to do with the PDF itself.

Ciphers handled

AES-256, the current standard, and the older RC4 schemes used by PDFs produced before roughly 2010. Both are read directly in your browser.

Very old or unusually produced files occasionally use variants that will not open. When that happens you get a message saying the encryption could not be handled, rather than a corrupted download.

The part about permission

Removing a restriction you were never meant to remove is possible. Whether it is acceptable depends on the document, and that is your call, not the tool's.

Reasonable: unlocking a bank statement so you can copy figures into a spreadsheet, a manual you paid for that will not print, your own archive from a job you left, a form your accountant needs to annotate.

Not reasonable: stripping protection from licensed material to redistribute it, or from a document that was locked specifically to stop you doing what you are about to do. Copyright and contract law apply to the result regardless of how easy the technical step was.

Why you need this before other tools

Every other PDF tool on this site refuses encrypted input at upload, and says so by name. That is why Merge PDF, Split PDF and the rest point here — decrypt once, then do the work.

To put a password back on afterwards, Protect PDF applies AES-256 encryption. Files up to 100 MB are accepted, and the password you type stays in the tab.