How to Password-Protect a PDF (Free, 2 Ways)

You can password-protect a PDF for free without Adobe Acrobat. Use Microsoft Word to convert an existing document, or an online tool like Smallpdf or iLovePDF to encrypt a finished PDF. Both methods let you restrict printing and copying too.

Method 1: Protect a PDF online (any device)

Use for PDFs you already have — works on Windows, Mac, and phones.

1. Open Smallpdf Protect or iLovePDF Protect.
2. Upload your PDF.
3. Enter a password (use at least 10–12 characters).
4. Choose what to allow: printing, copying text, modifying.
5. Click Protect / Encrypt, then download the secured PDF.

Privacy note: For sensitive documents, prefer offline methods (Method 2). Online tools process files on their servers.

Method 2: Microsoft Word (offline, no upload)

Useful when you still have the original Word/Google Docs file and want to keep it local.

1. Open the file in Word (or export from Google Docs as .docx first).
2. Click File → Info → Protect Document → Encrypt with Password.
3. Enter and confirm a password, then Save.
4. Click File → Save As → PDF and save. The PDF inherits the document’s password protection.

What does password protection actually do?

Encryption locks the file so it can’t be opened without the password. PDF passwords come in two types:

• Open password (“user password”) — required just to view the file.
• Permissions password (“owner password”) — restricts printing and copying but doesn’t prevent viewing.

Most consumer tools set both with one password.

FAQ

Is password-protecting a PDF free?

Yes. Online tools offer it free with daily limits, and Microsoft Word does it offline with no limits.

Can I remove a password from a PDF I own?

Yes — most PDF tools have a “Remove password / Unlock” option, but you must know the password. Forgetting it means the file is unrecoverable without brute force.

What’s the strongest password for a PDF?

Use a phrase or string of 12+ characters mixing uppercase, lowercase, and numbers — e.g. Draft-Q4-budget-2026!. Avoid names, birthdays, and common words.

Do password-protected PDFs protect against screen recording?

No. Anyone who can view the file can screenshot or record it. Password protection stops opening and editing, not screen capture.