PDFJar LogoPDFJar

Password Protect PDF

Add password protection to PDF documents instantly. Encrypt PDF files to secure your documents. Free, fast, and 100% private - all processing happens in your browser.

Drop PDF file here

or click to browse from your device

0 / 1 file
•Max 100MB per file

How to Password Protect PDF

Learn how to add password protection to PDF files using our free password protect PDF tool. Encrypt PDF documents instantly.

  1. 1

    Upload PDF File

    Select your PDF file or drag and drop it into the upload area. Our password protect PDF tool supports files up to 100MB. All processing happens in your browser - your file never leaves your device.

  2. 2

    Enter Password

    Enter a strong password to encrypt your PDF. This password will be required to open the protected PDF document. The password protect PDF tool uses encryption to secure your file.

  3. 3

    Password Protect PDF

    Click "Password Protect PDF" to add password protection to PDF. Our encrypt PDF tool applies encryption instantly. The password protection process completes in seconds.

  4. 4

    Download Protected PDF

    Download your password protected PDF file. The password protect PDF tool preserves all content while adding encryption. Anyone opening the PDF will need to enter the password you set.

Privacy Note: All PDF encryption happens entirely in your browser. Your files are never uploaded to our servers, ensuring complete privacy and security for your documents. When you password protect PDF documents, the encryption is applied locally on your device.