Lock PDF Online
Protect your PDF files with a password. Secure your sensitive documents by adding AES encryption directly in your browser.
Only edit documents that you own or are legally authorized to modify. Do not use this website to alter documents for fraud, misrepresentation, identity misuse, or any illegal purpose. You are fully responsible for how you use edited documents; Edit Scanned PDF is not responsible for unlawful or unauthorized use.
What Lock PDF does
Lock PDF adds AES password encryption to your PDF file. It prevents unauthorized users from opening, viewing, or modifying your sensitive documents.
How to use Lock PDF
- Choose a PDF file you want to protect.
- Enter a strong password.
- Click the Lock button and wait for processing.
- Download your newly protected PDF file.
Why people use Lock PDF
Protect Privacy
Keep sensitive personal information, like tax returns or medical records, safe from prying eyes.
Secure Sharing
Safely send confidential documents over email or chat by adding a strong password.
Control Access
Ensure that only people who are authorized and given the password can open the file.
Helpful tips
- Make sure you remember your password or store it in a password manager. If you lose it, the PDF cannot be recovered!
- The longer the password, the harder it is for someone to guess or crack.
- Use Unlock PDF later if you want to remove the password.