How to Add a Password to a PDF Without Adobe Acrobat
Lock a PDF with a password for free without Adobe Acrobat. Browser-based, no upload, AES encryption.
Adobe Acrobat is the traditional tool for encrypting PDFs, but FixMyPDF provides the same AES-256 encryption free, in your browser, with no account.
Adobe Acrobat vs FixMyPDF for Password Protection
Adobe Acrobat Pro applies AES-256 encryption with granular permission settings (restrict printing, copying, editing separately). FixMyPDF applies open-password protection with AES-256. For standard use — preventing anyone without the password from opening the document — FixMyPDF's protection is equivalent.
How to Encrypt Without Adobe
Go to fixmypdf.in/tools/protect. Upload. Set a password. Download the encrypted PDF. Done.
Built-In Alternatives on Mac
Mac Preview can set a PDF password: File → Export as PDF → check "Encrypt" and enter a password. This is a free built-in alternative. FixMyPDF is better when you are on Windows or need a consistent cross-platform approach.
Built-In Alternatives on Windows
Microsoft Office can export password-protected PDFs when saving Word/Excel files. For existing PDFs, FixMyPDF is the simplest no-install Windows option.
Try Protect PDF Now — Free
Browser-based, private, and instant. No account or software required.
Open Protect PDF