Password Protect PDF Online
Protect a PDF with an open password and optional owner password
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Contracts, payslips, medical records and ID documents should never travel as an unprotected attachment. This tool encrypts the PDF so a password is required to open it.
How to password protect a PDF
- Upload the PDF.
- Set the open password (at least 4 characters) and optionally an owner password for permissions.
- Convert, then download the encrypted file.
- Send the password through a different channel than the file.
Good practice
- Use a long passphrase, not a birthday or a name.
- Share the password by SMS or a password manager, never in the same email.
- Keep an unencrypted master copy in a safe location.
Frequently asked questions
Can the password be recovered?
No - encryption is real. If you lose the password the document cannot be opened.
Which algorithm is used?
AES encryption as implemented by the underlying PDF engine.
Are the uploads stored?
Only temporarily; the encrypted result is deleted after download.