How to Password Protect a PDF Free (No Software Required)
Add a password to any PDF for free — no Adobe Acrobat, no desktop software. AES encryption applied locally in your browser.
Password protecting a PDF prevents anyone without the password from opening it. FixMyPDF applies AES encryption locally — your document never leaves your device, and the password is set by you alone.
How to Password Protect a PDF
Go to fixmypdf.in/tools/protect. Upload your PDF. Enter a password. Confirm the password. Click Protect. Download the encrypted PDF.
What Encryption Is Applied?
FixMyPDF applies AES-256 bit encryption to the PDF. This is the same standard used by banks and governments. A correctly set strong password makes the document unreadable without it.
Choosing a Strong Password
Use a password of at least 12 characters mixing letters, numbers, and symbols. Avoid dictionary words or personal information. Store the password in a password manager — encrypted PDFs cannot be recovered if the password is lost.
How to Send the Password Safely
Never send the password in the same email as the protected PDF. Send the PDF by email and the password by a separate channel — text message, phone call, or a different messaging platform. This ensures that if the email is intercepted, the attacker has the encrypted file but not the key.
Privacy: Files Stay Local
FixMyPDF never sees your document or your password. Encryption runs in the browser. You are the only person who knows the password.
Try Protect PDF Now — Free
Browser-based, private, and instant. No account or software required.
Open Protect PDF