Add AES-256 password protection so a PDF cannot be opened without the password.
Lock a Document Before Sending It
Encrypts the PDF with AES-256 — the same standard used for sensitive documents in business and government. Without the password, the file cannot be opened at all.
Privacy Note
This tool needs server-side processing. Your file is uploaded only for the duration of the operation and is deleted from our server immediately afterwards — it is never stored, indexed, or shared.
Key Features
- AES-256 encryption, the current PDF standard
- Password confirmation to catch typos before you download
- We keep no copy of your file or your password, so there is no recovery
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