Encrypt PDF Online Free
Password-protect your PDFs with military-grade AES-256 encryption
Select PDF to Encrypt
Click to browse or drag and drop your PDF file here
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Password-protect a PDF before sharing
Set an open password so only people who know it can read the file, plus an optional owner password with printing, copying and editing restrictions.
Private by design
Your password locks the file on this device and is dropped from memory after. Tax returns and client contracts stay local, so only chosen readers open them.
How to Encrypt PDF with Password
- 1Upload your PDFUpload the PDF you want to protect.
- 2Set passwordsEnter a user password (required to open the PDF) and optionally an owner password (restricts editing and printing).
- 3Choose permissionsSelect which actions to allow: printing, copying text, editing. Restrict any combination.
- 4Encrypt & downloadClick "Encrypt PDF". Download the password-protected file. Your password never left your device.
Frequently asked questions
Which encryption is used?
AES — the modern standard supported by every current PDF viewer.
Do you keep my password?
No — it is used in your browser to build the encrypted file and then discarded.
What does encrypting a PDF do?
Encryption locks a PDF behind a password you set and can restrict printing and copying — the file stays unreadable without the password.
What is the difference between an open password and an owner password?
An open password blocks reading the file entirely. Owner restrictions limit printing, copying or editing on a file that opens freely. This tool sets both.
Can the password be recovered if I forget it?
No. The password never leaves your browser, so there is nothing to recover — keep a copy somewhere safe before you encrypt.