About this tool
Unlock PDF is a free, in-browser tool that removes encryption from a PDF you have the right to open: enter the password you know (or leave it empty for files that only have owner restrictions) and download an unencrypted copy. It runs on a WebAssembly build of qpdf inside your browser, so your file and your password never leave your device.
PDFs can be locked in two ways: an open (user) password that is required to view the document, and owner restrictions that block printing, copying or editing even though the file opens normally. This tool handles both — restriction-only files usually unlock with the password field left empty, while password-protected files need the correct password.
It does not crack or guess passwords. If the password is wrong, qpdf's own error message is shown and nothing is produced. Use it on your own documents, or on files whose password you were legitimately given — for example to stop typing the password every time, or to print a form your bank sent you locked.