Protect PDF
Add a password to your PDF to keep it secure
Drop your PDF here
or click to browse — Max 50 MB
Add a password to your PDF to keep it secure
Drop your PDF here
or click to browse — Max 50 MB
Skilltosky PDF Tools lets you password protect PDF files for free, directly in your browser. Enter a user password to restrict opening the document and an optional owner password to control printing and editing permissions. Whether you need to encrypt PDF files for sharing sensitive contracts or simply want to add a password to a PDF before emailing it, our free PDF locker gets it done in seconds — no account, no server upload.
Set a user password to require before opening, and a separate owner password to restrict printing and editing permissions.
The resulting PDF is encrypted using jsPDF's built-in encryption so only recipients with the correct password can open it.
Choose Medium (108 DPI), High (216 DPI, recommended) or Ultra (324 DPI) to balance file size against output sharpness.
Everything happens inside your browser. Your PDF and passwords are never transmitted to any server.
Upload your PDF, enter a user password (and optionally an owner password), choose an export quality and click Protect PDF. The encrypted file downloads instantly — no account or software needed.
The user password is required to open and read the PDF. The owner password controls permissions such as printing and editing. If you only set a user password, the same password is used for both.
Yes. The resulting PDF uses standard password-based encryption that is recognised by Adobe Acrobat, Reader, Preview on Mac, and most other modern PDF viewers.
Yes. All pages are rasterised to canvas before being written into the encrypted PDF, so the tool handles any PDF regardless of content type.
Because the entire process runs in your browser there is no server-imposed size limit. Very large PDFs may take a little longer on lower-spec devices.