Password Protect PDF - Encrypt Your PDF Online Safely

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2. ›Protect PDF

Reliable PDF Password ProtectionSecurely share your sensitive information by encrypting your files and requiring a password for access. This is the most effective way to prevent unauthorized access to your confidential data.No Data RetentionYour files are always safe with Smallpdf. We use TLS encryption for all data transfers and permanently delete files after one hour. We never save your document passwords.On Mac, Windows, and LinuxSmallpdf is a web application that can be accessed on any device with a web browser, including Mac, Windows, Linux, and mobile devices. Simply open your browser and add a document open password to your PDF!Secure Encryption for Maximum SafetySome PDF passwords can be hacked easily. With our AES 128-bit encryption, it would take thousands of years to crack your password with a regular computer.Password Strength for Added SecurityThe more complex your password, the safer your file is from unauthorized changes. We recommend using a non-dictionary word of at least 7 characters with numbers, capital letters, and symbols.Password-Protection in the CloudYou don't need any software to use Smallpdf's online services. You can protect your PDF with a password by simply uploading it, choosing a strong password, and then downloading the password-protected PDF.

How To Password-Protect a PDF Document:

1. Import or drag & drop your file to our Protect PDF tool.
2. Type and confirm the strong password you’d like to use.
3. Click “Protect” to add the password to your PDF.
4. Edit the PDF with our other tools if desired.
5. Download your password-protected PDF when ready—done!

Protect PDF Blog Articles

How To Protect PDFHow to Lock a PDF From Editing or CopyingThe quickest way to lock and protect the content of your PDF document from editing or copying.How To Protect PDFHow To Secure a PDF File for FreeSecuring a PDF with strong password protection has never been so easy, or cheap! How To Protect PDFHow To Password Protect a Word DocumentUse the Smallpdf encryption tool to protect your Word Documents with unbreakable passwords.How To Protect PDFHow To Password Protect a PDFA smart and simple solution for when you need to password lock your PDF files. How To Protect PDFHow To Encrypt a PDF Online for FreeYou can use the Smallpdf Protect PDF tool to encrypt your PDFs with unbreakable passwords online—for free.How To Protect PDFHow to Create a Strong Password the Old-School Way Creating a strong, secured and memorable password is not difficult. Follow our guide to do so at the snap of a finger.Show more articlesRate this tool4.2 / 5 - 13,522 votes