What can I do if I forgot the password to a PDF?

Last reviewed: October 20, 2026 · Markdown version

It depends which password you have lost. If the PDF opens and only printing, copying or editing is blocked, you lost a permissions password and can still read every page. If it will not open at all, you lost the open password, and Adobe's help pages describe removing a password only for someone who can already open the file; none of them offers a reset or recovery. So the real options are a copy from wherever the file came from, or the password from whoever set it.

Which password did you lose?

Adobe names the two kinds. A "Document Open Password: Requires you to enter a password to open and view the PDF, restricting access to its contents." A "Permissions Password: Allows you to restrict certain features in the PDF, such as printing, editing, copying content, and adding comments" (Password security overview, Adobe Acrobat Help, read 20 October 2026). Elsewhere on this site the open password is called the user password and the permissions password the owner password; they are the same pair. The test is simple: if you can scroll through the pages, it is the permissions (owner) kind, and nothing you need to read is locked away.

What Adobe's removal steps need

Adobe's removal page starts from an open file: All tools, Protect a PDF, Set security properties, then "To remove the document open password, deselect Require a password to open the document" and "To remove the permissions password, deselect Restrict editing and printing of the document", with the note "Type the permission password if prompted" (Remove passwords from PDFs, Adobe Acrobat Help, read 20 October 2026). That page, the overview above and Adobe's troubleshooting page, which lists "Can't open a password-protected PDF" as a case of its own (Why can't I open a PDF, Adobe Acrobat Help, read 20 October 2026), say nothing about recovering a password nobody remembers. We read that silence as the answer: there is no official way back in.

Where to get the file back

These are our suggestions, in the order that usually works:

The sender. Whoever protected the file can send it again without a password, or tell you the one they set.
The issuer's own site or app. Bank statements, payslips and tax forms are often downloadable again from the account that produced them, and the message that delivered the original sometimes explains how its password is built.
Your own password manager or notes. If you set the password yourself, look there first. Adobe's own advice when setting one is to "Store passwords in a password manager instead of writing them down or sharing them via email" (the Password security overview above).
An older unprotected copy. If you added the password yourself in an app, check whether the original is still in your downloads or email.

Next time: keep an unlocked copy safe

Apple builds the warning into its own steps. Before you lock a PDF in Preview on iPhone, it says: "To keep a copy that’s not password-protected, tap, then tap Duplicate" (Lock PDFs in Preview on iPhone, iPhone User Guide, read 20 October 2026). An unlocked copy kept somewhere private, plus the password in a password manager, means a forgotten password costs you nothing.

A word on unlocking sites

Our view: websites and tools that promise to remove an unknown open password ask you to hand a protected document, often a statement or an ID, to a stranger. If the file mattered enough to lock, that is the wrong trade. Ask the sender first.

If you only needed to search it

A file that will not open cannot be searched by anything, which the page on password-protected PDFs explains. DocFind on iPhone and Android follows the same rule: a PDF with a user password is refused and named in its list of files it could not read, while one with only an owner password is indexed and searched like any other, so a lost permissions password does not stop you finding what is inside.