Alto Protect PDF Files by PDFfiller

Add a password to your PDF with a safe, reliable, easy-to-use app. Alto Protect PDF Files runs in a browser and allows you to lock a PDF in one click.

You don’t have to pass numerous steps for signing in or enter your card number. Protect your documents with password simply, fast and absolutely for free.

The Alto Protect PDF extension is a free and easily downloadable tool to password protect PDF files. Once you install it, it appears as an icon in the upper menu of your browser. To use it, simply click the icon and a pop-up window will appear. There you can password protect a PDF file. It’s very simple and convenient to use. Every step for securing a document is consistent and intuitive. It features fast and easy-to-use results.

One of the significant benefits of password protecting PDFs in the Alto tool is that the extension doesn’t take up any memory on your device and takes up only a little memory in your browser. Alto is also available as a separate online platform and a mobile application that enables you to protect PDFs for free.

Consider the benefits of utilizing the Alto Protect PDF extension:

A user-friendly interface that guides users throughout the entire process. Every step of operation is straightforward. Opportunity to process documents from cloud storage. Import and export PDFs from Google Drive and DropBox. Top-notch security for your files and data protection via the latest encryption methods. The tool processes, but doesn’t store files. Data leakage is completely impossible. Apart from the password protection of files, users also have access to a PDF editor. You can introduce any changes to a document. Protect documents for free without switching between windows. The extension starts in the pop-up window, making it possible to stay on the main page.