Encrypt PDF
Protect the document with AES-256 encryption and a password.
Drop a PDF here
or click to browse · up to 100 MB each · press U
Any PDF
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How it works
- Upload the document.
- Set the open password readers will need, and confirm it.
- Optionally set a separate owner password that controls permissions.
- Choose what is allowed — printing, copying, modifying, annotating — then run the tool.
What goes in, what comes out
- Accepts
- Any PDF
- Produces
- An encrypted, password-protected PDF
- File limit
- 100 MB per file
- Your original
- Never modified — the result is a new file
- Retention
- Removed automatically after 2 hours
When people use it
- Protecting a contract or payslip before emailing it.
- Restricting a document circulated to a limited audience.
- Preventing casual copying of text from a published report.
Questions about Encrypt PDF
How strong is the encryption?
AES-256, the strongest scheme the PDF specification defines. Its practical strength depends on your password: a long passphrase is far harder to attack than a short word.
What is the difference between the two passwords?
The open password is required to view the document at all. The owner password governs permissions and is what you would need to change them later. If you leave it blank it matches the open password.
What happens if I forget the password?
The file cannot be recovered — not by us and not by anyone else. That is what AES-256 means. Store the password somewhere safe before you close the page.
