When to password protect a PDF
Password-protecting a PDF is the right move before emailing sensitive documents — financial statements, contracts, medical records, personal IDs — to prevent anyone who intercepts the email from opening the file.
How to add a password to a PDF for free
- Go to ihatepdf.cv/encrypt-pdf
- Upload your PDF
- Set an open password (required to open the file)
- Optionally set a permissions password (controls editing/printing rights)
- Click Encrypt and download the protected PDF
Two types of PDF passwords
- Open password (User password) — anyone who tries to open the file must enter this password. Without it, the file won't open at all
- Permissions password (Owner password) — controls what an authorized user can do: printing, copying text, editing, filling forms
What encryption standard is used?
ihatepdf uses AES-256 encryption — the same standard used by banks and government agencies worldwide. Your password and file never leave your device — encryption runs entirely in your browser.
Frequently asked questions
Can I remove the password later?
Yes — use ihatepdf's password remover with the current password.
What happens if I forget the password?
AES-256 encrypted PDFs cannot be recovered without the password. Store it somewhere safe.
Does the encrypted PDF have a watermark?
No. ihatepdf never adds watermarks to any output file.