There are two different needs around PDF passwords: permanently removing a password you know, or adding a password to protect a document. You can do both with separate tools.
Removing a password (unlocking)
If a PDF keeps asking for a password and you want to use it without typing one each time, the Unlock PDF tool can remove the password permanently. You need to know the document's password.
- Upload the PDF: Add your password-protected document to the Unlock PDF tool.
- Enter the password: Enter the document's current password — only for documents you're authorized to.
- Download the unlocked file: The tool removes the password; no more prompt on each open.
Unlock PDF — Remove a password you know and use the PDF freely.
Adding a password (protection)
The opposite: to protect a sensitive contract, medical report or financial document when sharing, the Encrypt tool lets you add an open password to a PDF, so only those who know it can open the file.
Encrypt PDF — Add an open password to your sensitive document.
Only remove passwords from documents you own or are explicitly authorized to.
A PDF can carry two different passwords
Most of the confusion comes from the PDF standard defining two separate passwords that do very different things.
- Open (user) password: required to open the document. Without it the file cannot be viewed at all, because the content is genuinely encrypted.
- Permissions (owner) password: the document opens without a prompt, but printing, copying or editing is restricted. That restriction is a flag the viewer application chooses to respect — not as strong as encryption.
So someone who says their PDF is protected yet opens fine is dealing with the second kind. That is usually what needs removing to work with the document freely.
Which password should you use?
When protecting a document, the question is whether you want to stop people seeing the content, or let them see it but not reuse it. Medical reports, financial statements and documents holding identity data need an open password, so nobody without it can open the file. When sharing a proposal or a catalogue the goal is usually to prevent editing, and a permissions password is enough.
How to share the password
Sending the encrypted file and its password in the same email makes the protection pointless; anyone reading that email gets both. The standard practice is to send the file by email and the password through another channel — a phone call, a text message or a different app. In corporate correspondence this is an explicit requirement in most information-security policies.
- Do not put the password in the file name: «contract-1234.pdf» defeats the purpose.
- Do not reuse the same password across documents.
- Avoid guessable strings such as birthdays or ID numbers.
- Remember that if you forget the password the document cannot be opened — keep a backup.
If you do not know the password
There is no legitimate way to open a document whose open password is unknown; that is the design intent of the protection, not a shortcoming. If the document is yours and you forgot the password, getting it again from the sender or from the program that created it is the only route. Trying to defeat protection on someone else's document creates both ethical and legal problems.
After the password is removed
An unlocked file is unprotected: left in a cloud backup, a shared folder or a mailbox, anyone can open it. Remove the password only for as long as you need to work on the document, and delete the unprotected copy afterwards. If you will share the document again, adding a password back is the cleanest route.