Unlock PDF
Remove the password from a PDF you can already open, so you stop typing it in. You provide the password; nothing is recovered or guessed.
Unlock PDF
Removes the password from a PDF you can already open, so you don't have to type it in every time. You'll need the password itself — this doesn't recover or guess one.
What this tool is, and what it isn't
It removes protection from a document you already have access to. You give it the password, it decrypts the file the same way your PDF reader does, and it writes the document back out without the encryption. That is the whole operation.
It is not a password recovery tool. There is no brute force, no dictionary, and no attempt to defeat the encryption. Type the wrong password and the attempt stops there. If you have lost the password to a document, this page cannot help you, and neither can any page that runs entirely inside your browser.
The two passwords a PDF can have
A PDF carries a user password, which is needed to open it at all, and an owner password, which governs what you may do once it is open: printing, copying text, extracting pages. Most protected documents people meet have only the second one, with an empty user password. They open with a double-click and then refuse to let you copy a paragraph.
That is why this tool tries an empty password before asking you for anything. If the document is only restricted, you never see a prompt.
Why doing this in the browser matters here
Every other unlock tool on the web asks you to upload the file and type the password into their form. Think about what that involves: the document is encrypted because it is a payslip, a medical result, a contract, a bank statement — and you would be sending both it and the key to a server you know nothing about.
Here the decryption runs on your own machine, in code your browser downloaded and you can inspect. The file and the password never leave the page. You can confirm that yourself with the Network tab open.