Protect PDF
Lock your PDF with a password to prevent unauthorized opening.
How to password protect a PDF quickly and securely
Sending a contract, a payslip, or an ID and want to limit who can open it? One2PDF lets you password protect a PDF online for free, with no software to install. Import the file, choose a password, confirm it, then download a locked PDF.
Encrypting a PDF does not have to be expert-only. The tool asks for the password on open and leaves the content unchanged for people who know it. It is a practical way to lock a PDF, secure a sensitive file, or stop unauthorized opening.
Security stays at the center of the flow: the original is not kept, the protected PDF is available for download, then deleted. No account is required for occasional use. Protect your PDF now, store the password, and come back to One2PDF whenever a document must stay private. The whole process takes only a few seconds, with no extra software on your computer.
What this tool does
- Locked opening — Nobody can open the file without the password.
- Simple and clear — One password, one confirmation, and the PDF is locked.
- No extra software — Protect the document directly in the browser.
- Fast processing — The encrypted file is ready in a few seconds.
- Everyday use — Contracts, records, ID scans: keep them private.
- Temporary files — The original is not kept on the server.