Remove Password from PDF: Free and Paid Methods Compared

Few things are more frustrating than grabbing a PDF you need to open, only to hit a password prompt and realize you either don’t know the password or just want the file unlocked for good. The good news: there are several legitimate ways to remove password protection from a PDF — some free, some paid, and almost all of them require you already know the password.

Methods to remove PDF password: 4 ·
Free online tools compared: 3 ·
Adobe Acrobat monthly subscription: $19.99

Four primary methods exist to remove a password from a PDF, but they split into two categories: methods that require the password and methods that try to work around a forgotten one. Here’s how they compare.

The trade-off: every reliable method demands the password upfront. Free online tools offer convenience at the cost of uploading sensitive files to a server.

How do you remove password protection from a PDF?

Using Adobe Acrobat

Adobe Acrobat is the most authoritative method because it’s from the company that created the PDF format itself. According to Adobe Acrobat’s official support page, the process works like this:

1. Open the PDF in Acrobat.
2. Select Tools > Protect > Encrypt > Remove Security.
3. Enter the password when prompted.
4. Confirm the removal.

Adobe distinguishes between a Document Open password (needed to view the file) and a permissions password (controls editing/printing). If you have the permissions password, Acrobat can strip both types of protection. However, Adobe notes that you need an Acrobat Pro subscription (from $19.99/month) or a free trial — Acrobat Reader and mobile apps can only open password-protected files, not permanently remove the lock.

The implication: Adobe Acrobat is the gold standard for legitimate password removal, but it’s a paid tool. If you only need to unlock a PDF occasionally, the subscription cost may be hard to justify.

Using Preview on Mac

Mac users have a built-in option that doesn’t cost anything. A Reddit user on the MacOS subreddit noted you can remove a password from a PDF using Preview: open the file, enter the password, then go to File > Export, uncheck the “Encrypt” box, and save a new copy. This method works perfectly for PDFs where you already know the password and just want a clean, unlocked version. Preview does not offer any password recovery — if you’ve forgotten the password, this method won’t help.

Why this matters: Preview is a zero-cost, offline solution that doesn’t upload your file anywhere, making it the most privacy-friendly option for Mac users.

Using online tools

Several online tools can remove PDF passwords in seconds. Smallpdf’s Unlock PDF tool requires no signup and is free to try, though the free tier limits you to 2 files per day. The workflow: upload the locked PDF, type the password, and download the unrestricted document. iLovePDF offers a similar unlock tool where you drop a file or select it from your device. Syncfusion’s free PDF tool adds the ability to import from cloud services like Google Drive, Dropbox, or OneDrive. All three require that you know the password — they cannot crack or bypass it.

The catch: uploading sensitive PDFs to a third-party server carries privacy risks. Smallpdf and iLovePDF both state they delete files after processing, but if your document contains personal or confidential data, an offline method like Preview or Acrobat is safer.

How to remove password from PDF for free?

Best free online PDF unlockers

Three free online tools stand out for removing PDF passwords: Smallpdf (2 free unlocks per day), iLovePDF (no daily limit but processing limits on the free plan), and Syncfusion (completely free with no daily cap). All three follow the same pattern: upload the PDF, enter the password, and download the unlocked version. Smallpdf states its tool can also remove permission restrictions, not just open passwords. iLovePDF says its unlock tool removes PDF password security and transforms the file for later use.

The trade-off: free online tools are convenient but come with file size limits (typically 50-100 MB) and the privacy concern of uploading your document to an external server.

• Smallpdf — 2 free files daily, no signup needed
• iLovePDF — Unlimited free unlocks with basic features
• Syncfusion — Completely free, no account required, supports cloud imports

Free desktop tools

For users who prefer not to upload files online, free desktop methods exist. The most reliable is using Preview on Mac (detailed above). On Windows, a workaround documented in a Microsoft Tech Community discussion involves printing the password-protected PDF to “Microsoft Print to PDF.” This creates a new PDF without the original password — but only works if you can open the file (i.e., you know the password). Another approach from the same discussion suggests using a Python script to remove permissions, though this is technically advanced and may not work with all PDFs.

The pattern: free desktop tools are more privacy-safe than online ones, but they require you to know the password and often lack polished interfaces.

Limitations of free methods

All free methods share a common limitation: they require the password. Adobe’s guidance makes this explicit — legitimate removal of protection depends on knowing the correct password, not bypassing it. Free online tools also impose restrictions: Smallpdf limits free users to 2 files per day, and iLovePDF may queue larger files on the free tier. For users who need to unlock many PDFs, a paid subscription like Adobe Acrobat Pro removes these limits entirely.

What this means: free methods work well for occasional use with files under 100 MB. If you regularly handle password-protected PDFs, the productivity loss from daily limits may justify paying for a tool.

How do I open a password protected PDF if I forgot the password?

Using Adobe Acrobat password recovery

Adobe Acrobat does not include a built-in password recovery feature. If you’ve forgotten the password, Adobe’s official stance is clear: the company cannot recover passwords, and there is no backdoor. Any service claiming to “recover” a PDF password without some form of brute-force attack is misleading. Adobe distinguishes between an open password and a permissions password — but knowing this distinction doesn’t help if you don’t know either one.

Why this matters: if you’ve truly forgotten the password, your options are extremely limited. The only legitimate path is to contact the document’s creator and ask for the password.

Third-party password recovery tools

Some third-party tools claim to recover or remove PDF passwords when you’ve forgotten them. A Microsoft Tech Community discussion mentions a “PDF cracker” approach and a Python script method, but these are technically advanced and often ineffective. A YouTube tutorial claims a web tool can unlock PDFs by uploading the file and selecting unlock options — but the confidence level for such claims is low. These tools typically use brute-force or dictionary attacks, which may take hours or days and often fail on strong passwords.

The catch: many third-party recovery tools are scams or malware. Even legitimate ones violate Adobe’s terms of service and may not work. For sensitive documents, downloading unverified software poses a security risk.

PDF password recovery limitations

There are no guaranteed ways to open a password-protected PDF without the password. Encryption standards used in PDFs (AES-128 or AES-256) are designed to be computationally infeasible to crack with current consumer hardware. A YouTube tutorial demonstrates a browser-based workaround where you enter the password, then print to PDF to save a new copy — but again, this assumes you know the password. If you’ve forgotten it, printing won’t help because you can’t open the file in the first place.

The implication: for the average user, forgetting a PDF password means losing access to the file. The only realistic options are contacting the document owner or retrying password variations you may have used.

“You can remove password from a PDF using the in-built Preview app. Just open the file, go to Export, and uncheck the encrypt box.”

— Reddit user, MacOS subreddit discussion on PDF password removal

“Adobe Acrobat Pro offers password removal features, but you need a paid subscription or a free trial to permanently remove protection.”

— Adobe Acrobat support page

For anyone dealing with a password-protected PDF, the line between legitimate access and risky workarounds is clear: if you have the password, multiple free and paid tools can remove it in seconds. If you’ve forgotten it, no reliable method exists to unlock the file without significant effort or risk. For the average UK user trying to open an old bank statement or a work document, the best strategy is to try common passwords you’ve used before, or contact the sender. The choice is straightforward: use a trusted offline method like Preview or Adobe Acrobat for privacy, or accept the convenience of an online tool for less sensitive files.

For those who prefer not to install software, free online methods to unlock PDFs offer a quick alternative to desktop tools.

Frequently asked questions

For further reading on related PDF tasks, see GCSE Maths Past Papers – Free PDF Downloads by Board and How to Take a Screenshot on a Mac: Essential Shortcuts and Tips.