When and how to password-protect a PDF

2026-10-27

Emails get forwarded, phones get lost and links get shared further than intended. If a PDF contains personal information, a password is a simple extra layer of protection.

When to add a password

  • ID proofs: Aadhaar, PAN, passport copies
  • Salary slips, bank statements and tax documents
  • Medical reports
  • Contracts and agreements before they are final
  • Anything with phone numbers, addresses or account numbers

Steps

  1. Open Protect PDF.
  2. Select the PDF.
  3. Type a password (at least 4 characters; longer is better).
  4. Click Protect PDF and download the encrypted copy.

The file is encrypted with 256-bit AES. Anyone opening it, on any device, will be asked for the password.

Choosing a good password

  • Use at least 8 characters with a mix of letters and numbers.
  • Don't use only your name or date of birth, which are easy to guess.
  • Share the password separately. If you email the PDF, send the password by SMS or phone call, not in the same email.

If you forget the password

There is no way to recover it from the file. Keep an unprotected original in a safe place on your own device.

Removing the password later

If you know the password, Unlock PDF saves a copy without it.

Privacy

Protect PDF runs on our server. Your file and password are used once and deleted immediately. We never store passwords.

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