How to use Password Protect PDF Online
Choose your PDF, enter a strong password, and download an encrypted copy. The PDF is encrypted without converting pages into images, preserving original text, graphics, links and forms.
How to lock a PDF
- Choose a PDF, enter and confirm a password, then download the protected document.
- Review the preview, selected options or calculated result before saving.
- Download or copy the result if the tool offers that action.
Important notes
Keep your password safe: we cannot recover forgotten passwords. Processing runs in your browser using the WebAssembly PDF engine; its engine is served directly from ToolNivora. Very large files may require more device memory.
Password Protect PDF Online: frequently asked questions
How do I use password protect pdf online?
Choose a PDF, enter and confirm a password, then download the protected document.
What should I check when using password protect pdf online?
Store the password safely; a lost password may prevent access to the PDF.