How to Password Protect a PDF Online
Free, step-by-step guide. No signup needed — everything runs in your browser.
1
Open the PDF Password Protector
Navigate to the tool. No signup, no upload to a server.
2
Upload your PDF
Drop the PDF you want to protect. Files stay in your browser — critical for sensitive contracts, financial records, or personal documents.
3
Set a strong password
Pick a password to encrypt the PDF. Anyone trying to open the file will need this password. Confirm it to avoid typos.
4
Download the protected PDF
Hit Encrypt — a new, password-protected PDF is generated. Download instantly. Share with confidence.
Tips for best results
- Use a strong password: 12+ characters, mix of letters, numbers, and symbols. Avoid common words or birthdays.
- Send the password through a different channel than the PDF — e.g., email the PDF, then text the password.
- Lost passwords cannot be recovered — the encryption is real. Keep a secure copy in a password manager like 1Password or Bitwarden.
- If you forget the password, you’ll need our PDF Unlocker tool (which only works if the password is provided or, for some files, easy-to-guess legacy ones).
- For maximum security, also strip metadata from the source PDF first — sensitive details like author name and creation timestamp can leak even from password-protected files.
Try PDF Password Protector now
Add password protection to PDFs. Free, no signup, 100% private.
Open PDF Password Protector