Unlock PDF

This removes a password you know — it doesn't crack one

Be clear on what this tool is for. If you have a PDF you are entitled to open and you know its password — your own bank statement, a payslip, a document a colleague shared with you and told you the password to — Unlock PDF strips that protection so the file opens freely from then on. It decrypts using the password you supply and saves a clean, unprotected copy.

What it is not is a password recovery or cracking tool. It cannot open a PDF whose password you don't have. There is no brute-force, no guessing, no bypass — if you can't supply the password, the file stays encrypted. That's a deliberate design choice: removing protection from a document you have legitimate access to is routine housekeeping; defeating protection on a document you can't open is something else entirely.

Owner password vs user password

PDFs support two distinct passwords and they do different jobs. The user (open) password is the one that stops the file from opening at all — without it, you see nothing. The owner (permissions) password leaves the file readable but restricts what you can do with it: printing, copying text, editing or annotating may be blocked even though the document opens normally.

That's why a PDF can open instantly yet refuse to let you print or copy from it — it has an owner password but no user password. To lift either restriction you need the corresponding password. Once removed, the resulting file has no encryption and behaves like any ordinary PDF: it'll open, print and copy without prompting, and you can then merge, compress or annotate it freely.

Permissions and the obvious caveat

• Only remove protection from documents you have the right to use — your own files, or files whose owner has authorised you. Stripping protection to bypass someone else's access controls or licence terms may be unlawful where you are; that's on you, not the tool.
• Removing the password is permanent for the saved copy — it has no encryption afterwards. Keep the protected original if you still need it locked, and don't store the unprotected copy somewhere less safe than the original lived.
• An owner-password-only file opens fine but blocks printing or copying until unlocked; a user-password file won't open at all without its password.
• Because this runs in your browser, the password and the decrypted file never leave your device — which is precisely why it's safer than uploading a confidential locked PDF to a remote service.