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Lock PDF files A free online tool to password protect and encrypt PDF files. Just upload your document, lock your PDF, and download the file.
Next step: Choose password and security settings
Protect PDF files
With our easy-to-use online PDF protection tool, simply upload your PDF, set your password, and download the secured PDF.
Choose your secured PDF options
Flexible options allow you to choose what features are enabled or disabled on the PDF document after it's been locked.
Online PDF Protection
LockPDF is an online tool and is available everywhere you go using a desktop or mobile device.
We take your security seriously
We lock your files with a strong encryption that is virtually impossible to break. Our locked PDF files even stand up to top unlocking tools.
PDF Encryption and file removal
All the PDF files processed on our website pass through SSL ports and files are automatically deleted after a certain amount of time.
How to password protect PDF
Simply upload your file, choose what options should be disabled (viewing, editing, printing, etc) and download your secured PDF instantly.