Forgot Your PDF Password? What You Can Do (2026)

An unknown PDF password can't be legitimately removed; find the format in the original email, re-download the document, or ask the sender.

If you've forgotten a PDF's password, no honest app can simply remove it. That includes Preview, Adobe Acrobat and UnKey. The practical fix is to find out what the password is supposed to be, or to get a fresh copy of the document. For bank and card statements, the password is almost always a format built from your own details, so you can usually work it out.

Why apps can't just remove it

A PDF open password isn't a lock on top of the file. The password is used to encrypt the contents. Without it, the app only has scrambled data. That's why Adobe's own unlock instructions start with opening the file and, for permissions passwords, typing the password in (Adobe: How to remove a PDF password). Apple's Preview also asks for the password before it shows anything. Tools that remove passwords, UnKey among them, need the correct password first.

Step 1: Read the email the PDF came with

Banks, card issuers, insurers, mutual funds and tax portals nearly always explain the password in the email or SMS that came with the document. Search your inbox for the sender and look for a line like "the password is…" or "to open this statement, enter…". It usually describes a pattern, for example the first four letters of your name in capitals followed by your date of birth as DDMM.

Step 2: Try the format with your details as the issuer has them

• Name: use your name exactly as it appears on the account, which may include an initial or a different spelling.
• Capitals: PDF passwords are case-sensitive.
• Date of birth: DDMMYYYY, DDMMYY and DDMM aren't the same. Check which one the issuer asks for.
• Mobile number: use the number registered with that account, which might be an old one.
• Customer ID or account number: some issuers use these instead of personal details.

Example: say a statement email tells Priya Sharma (born 15 May 1990) that her password is "first four letters of your name in capitals + DDMM". Her password would be PRIY1505. This example is made up. Always follow the format your own issuer gives you.

Step 3: Download the document again

If the email is gone, log in to the issuer's website or app and download the statement there. Many apps show statements without a password, or tell you the password format on the download screen. A fresh download also replaces any file that got corrupted.

Step 4: Ask the sender

Call customer care or use the issuer's secure messaging and ask how statement passwords are formed. They won't read out your password, but they will tell you the format and which details they have on record. For a PDF from a person, such as an accountant or an employer's HR team, just ask them.

Why "PDF password crackers" are a bad idea

• They often don't work. Modern PDFs use strong encryption, and the qpdf documentation recommends 256-bit encryption for new files (qpdf). Guessing a long password can take far longer than calling your bank.
• Malware risk. Free "password recovery" downloads are a common way to get unwanted software onto a computer.
• Your file leaves your device. Online crackers need you to upload the statement, along with your account details, to someone else's server.
• It may not be yours to open. Opening someone else's protected document without permission can be illegal, whatever tool you use.

Once you have the password

Save it somewhere secure, such as Apple's Passwords app or an app that keeps it in the device Keychain. Then remove the password from your own copy so you don't have to look it up again. Our guides for iPhone and Mac cover the free built-in methods and UnKey.

Questions

Sources

• Adobe – How to remove a PDF password
• qpdf – Command-line options

Formats can change. If a password doesn't work, check the email the document came with or contact the issuer. UnKey isn't affiliated with any bank, employer or authority named here.