Remove a PDF password you already know

Banks, payroll providers and insurers often send statements as encrypted PDFs, with a password built from something you already know, such as your date of birth or part of an account number. For reading one statement that is fine. It turns into a problem when you need a year of them in a single file, or an upload form refuses them, or you are tired of typing the same thing every month.

Where the password came from

Plenty of people never set the password and do not realise the sender did. This is from the Adobe Community forums:

An Adobe employee replied that passwords on bank statement PDFs are "normally applied by your Bank", and that "You should be seeing hints of the password on the email where you receive the statement." That email, or the bank's own help pages, is the first place to look.

Once you have the password, typing it in lets you read the file. It does not take the lock off. Saving a copy is not guaranteed to remove it either: qpdf, the open-source engine inside our tool, documents keeping the input file's encryption as its default behaviour and only drops it when explicitly told to. To get a file that stops asking, you need a step that removes the encryption on purpose.

Open password or permissions password

A PDF can carry two kinds of password, and every program names them differently.

A file can have both. A file with only a permissions password opens without asking, so it is easy to believe it has no password at all. It is still encrypted inside, and that can be enough for an upload check to reject it. This bank customer ran into something that looked exactly like that:

The thread never settled which case it was, and the community expert's advice was to report it to the site doing the upload. You can check your own file quickly: drop it into our unlock tool, and if there is no encryption at all it answers "This PDF is not password-protected." If there is, and you set the permissions password yourself, use it. If the bank set it, ask the bank for an unrestricted copy. Our tool will not strip restrictions without the password.

Upload forms and merge tools that refuse locked files

Here the stakes were higher. The poster was trying to get a document to their bank from a phone:

An encrypted PDF cannot be read by anything that lacks the password, so a portal inspecting the file, or a tool combining pages, has nothing to work with and refuses it or mangles it. Our own Merge PDF tool is no exception. When we fed it a locked file on September 30, 2026, the file either failed to load or merged in as a blank page. It does not ask for passwords, so unlock each file before you add it.

Merge PDF

Removing it in the browser

Our Remove PDF password tool runs entirely in the browser. This is what the code actually does:

• It takes one PDF at a time and, as soon as you drop it in, checks whether the file carries encryption.
• You type the password and press Convert. For a file that only has a permissions password, that is the permissions password.
• The right password gives you a copy ending in _unlocked with no encryption. Text, images and pages are left exactly as they were.
• A wrong one gives "That password is not correct." Until September 27, 2026 the tool wrongly said the file looked damaged in that case; that is fixed.
• The work is done by qpdf compiled to WebAssembly. The engine, about 1.3 MB, downloads the first time you run it. Neither the file nor the password is sent to a server.
• It works in phone browsers too, although files of tens of megabytes can be slow.

Remove PDF password

It cannot guess, crack or recover a password, and we are not going to build anything that does.

An unlocked file opens for anyone who gets hold of it. Keep unlocked copies on your own device. If you have to send one, lock it again with a fresh password and share that password by a different route, such as a text message.

Acrobat, Preview and qpdf

Adobe Acrobat Pro (paid)

Adobe's help page gives the path as All tools > Protect a PDF, then Remove security in the left panel. For a Document Open password you just select OK, since you already opened the file with it. For a permissions password you type it into the Enter Password box, select OK, then confirm with OK again. Adobe describes this for Acrobat Pro; we did not find it confirmed for the free Acrobat Reader.

Preview on a Mac

Preview trips people up because exporting looks like it should work. From the Mac Power Users forum:

One reply suggested File > Export as PDF. The poster came back with: "The exported PDF still requires the password." Apple's Preview User Guide puts these settings under File > Edit Permissions, where you find the Require Password To Open Document checkbox, the permission checkboxes and the owner password. The guide explains setting and changing them but does not describe taking them off, and we have not tested that on a Mac ourselves.

qpdf on the command line (free)

If you are comfortable in a terminal, qpdf does it in one line: qpdf --password=YOURPASSWORD --decrypt in.pdf out.pdf. The manual describes --decrypt as creating "an output file with no encryption even if the input file is encrypted", and adds that it is not intended for bypassing restrictions a file's producer put in place. It is the same operation our tool runs in the browser.

If the password is gone

Adobe's help is blunt about this: "If you are the owner of a PDF and don't remember the password required to open the PDF, you have to re-create the PDF. There is no way to recover the password in Acrobat." The same is true of our tool.

For a statement, payslip or tax form, the practical route is the issuer. Download it again from the bank or employer portal, ask for a copy without a password, or look for the password rule in the message the file arrived with.