File encryption pdf

Word to PDF. Excel to PDF. Unlock PDF. Protect PDF. Reliable PDF password protection. Encrypt your PDF with a password to prevent unauthorized access to the file content, especially for file sharing or archiving. Passwords and files are safe with us. All files and passwords are transferred using secure SSL connections. Files are deleted permanently after one hour. Passwords are deleted instantly after processing.

On Mac, Windows, and Linux. As a web application, we can support all platforms like Mac, Windows, and Linux. Protecting PDFs everywhere! Secure encryption for maximum safety. Require a password to open this document.

Restrict editing, copying and printing with owner password. File Uploading. This is an encrypted file. This file is encrypted by open password, we can't get access to the content.

Please enter the correct open password, and try to convert it again. This is an encrypted file This file is encrypted, please select another file or use the Unlock PDF function.

Unlock PDF. The selected file is too large. Please select a file less than 20 MB. PDF files are great to use—as they protect others from editing. However, in cases where you want to prevent the viewing of a PDF—you can use our online tool to lock it securely with a password. And not just any passwords. Standard PDF lockers are unreliable—such passwords are not encrypted and can be broken easily with free online tools.

We use SSL encryption for all online file transfers; our servers also remove them after one hour. As Smallpdf operates online, you can access our platform via your favorite internet browser Firefox, Edge, Safari, Chrome, etc. And because of this, make sure that you always note down the password of the file. Also throw in a mix of numeric characters, capitalization, and even special symbols. The more substantial the password, the higher the chances that no one can gain unauthorized access to it.

The tool that you can use to encrypt your PDFs is free to use, twice per day. If you work extensively with digital documents and require further usage—consider getting a Pro account , where we remove this usage limit. Otherwise, it acts as a smart PDF reader for you to view your documents.

No registration is needed.