Unlock a PDFyou can already open

Two different locks, two different answers

A PDF can be locked in two quite different ways, and it matters which one you have. Some will not open at all without a password — those stay shut until you type it, here as anywhere else, because the pages really are encrypted. Others open perfectly well and merely carry flags asking readers not to print or copy; their open password is empty, so lifting those takes nothing but a click. Docqify works out which one you have dropped and tells you, rather than asking for a password that may not exist.

• A document that needs a password still needs it. It is used on your device to decrypt the file and is kept nowhere.
• Page content, form fields and annotations all survive. The simple approach — copying pages into a new document — quietly drops every form field, which is why this takes the encryption apart instead.
• The title and author do not survive, because a PDF reader library cannot recover the metadata of an encrypted document intact. That is stated here rather than discovered later.
• Everything runs on your device. The page ships a Content Security Policy that blocks connections to any other origin, so neither the document nor the password can be sent anywhere.