How to Remove a PDF Password You've Forgotten (Legally)

Forgetting a PDF password is frustrating — and surprisingly common, especially for documents you protected years ago. Before trying any removal method, it's important to understand that there are two fundamentally different types of PDF password, and they require completely different approaches to remove.

Legal Notice: The information in this guide is intended for people removing passwords from PDF files they own or have authorised access to. Removing passwords from files you don't own or aren't authorised to access is illegal in most jurisdictions under computer misuse laws. Always ensure you have the right to modify the file in question.

The Two Types of PDF Password

Open Password (User Password)

Also called a "document open password." Required just to open and view the PDF. Without it, the file cannot be opened at all — it displays as encrypted and unreadable. This is true encryption protecting the entire file contents.

Removal difficulty: Hard — requires the original password or brute-force cracking

Permission Password (Owner Password)

Also called a "permissions password" or "restriction password." The PDF opens and is readable without it, but certain actions are restricted: printing, editing, copying text, or adding comments. The password only unlocks these permission restrictions.

Removal difficulty: Easy — most tools can remove this type regardless of the password

Which Type of Password Do You Have?

Try to open the PDF without any password:

If the PDF asks for a password before showing anything → It's an open password. You must know (or recover) the password to access the file.
If the PDF opens and you can read it, but printing/editing is greyed out → It's a permission password. Any PDF unlocker tool can remove these restrictions without knowing the password.

Removing a Permission Password (Restrictions)

Permission passwords are enforced by PDF viewer software through a flag in the PDF file — but the file itself is not encrypted for reading. This means tools can write a new copy of the PDF without the restriction flags, regardless of what the original password was.

Method	How	Notes
Online PDF Unlocker	Upload PDF, tool removes restrictions, download	Fastest method. Works for all permission passwords.
Google Chrome Print	Open PDF in Chrome → Print → Save as PDF	The "printed" PDF loses permission restrictions. Free, no upload.
Adobe Acrobat Pro	File → Properties → Security → No Security	Requires knowing the owner password, or Pro subscription features
Ghostscript (CLI)	`gs -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=unlocked.pdf input.pdf`	Free, open-source, works on any platform, no file upload

Recovering or Removing an Open Password

If the PDF requires a password to open, your options are more limited:

Try common passwords first: Many people use predictable passwords — your name, birth year, "password", "1234", or the document subject. Try these before any other method.
Check password manager history: If you use LastPass, 1Password, Bitwarden, or a browser password manager, search for the document name or the application you used to create it.
Contact the sender: If someone else created and protected the PDF (a bank, accountant, or government agency), contact them to resend without a password or provide the password.
Dictionary and brute-force cracking: Tools like Hashcat or PDF Password Remover can attempt to crack open passwords by trying millions of combinations. This works if the password is short or common, but may take hours, days, or be impossible for strong passwords (256-bit AES with a long random password).

Realistic expectation: If the PDF was encrypted with 256-bit AES and a strong random password you don't remember, recovery is effectively impossible with current technology. The encryption is mathematically secure.

Chrome trick for permission-locked PDFs: Open the PDF in Google Chrome (drag and drop the file). Press Ctrl+P (Print). In the print dialog, change the destination to "Save as PDF." Click Save. The newly saved PDF file has all permission restrictions removed — you can now edit, print, or copy text freely.

What Each Tool Is Best For

Tool	Open Password	Permission Password	Privacy (No Upload)
Online PDF unlocker	Depends on tool	Yes	No — file uploaded
Chrome Print trick	No	Yes	Yes
Ghostscript	If known	Yes	Yes
Hashcat / cracker	Yes (if weak password)	No	Yes
Adobe Acrobat Pro	If known	Yes (with owner pw)	Yes

Frequently Asked Questions

Is it legal to remove a PDF password from a file I own?

Yes — removing protection from a file you own or created is legal. The legal issues arise when you attempt to bypass protection on files you don't own, such as commercial e-books with DRM, or confidential documents belonging to someone else. Removing protection from your own bank statements, tax documents, or files you created is legitimate.

Why can some tools remove PDF passwords without knowing the password?

For permission passwords, the PDF file itself is not encrypted — only certain operations are blocked by a flag that PDF viewers respect. Tools that remove permissions don't "crack" the password; they simply write a new PDF without the restriction flags. The actual password is never needed because the content is already accessible.

How can I avoid forgetting PDF passwords in the future?

Store any password you set on a PDF in a password manager immediately when you create it. Better yet, consider whether the permission restrictions are actually necessary — if you're the only one using the file, a permission password provides minimal real security and mostly inconveniences you. Reserve strong open passwords for genuinely sensitive documents.

Remove PDF Password Restrictions — Free

Upload your permission-locked PDF and download an unrestricted version instantly. Works for printing, editing, and copy restrictions.

Open PDF Unlocker →