Password Protect PDF

Add password protection to PDF documents with PrivatePDF. Choose a supported, unprotected PDF, enter and confirm your password, and download a password-protected copy. Processing stays in your browser; password protection is not an absolute security guarantee.

Get started with 10 free PDF jobs per month, shared across PrivatePDF tools. Sign in or create an account when prompted to apply protection.

Enable JavaScript to use Protect PDF. Document processing for this tool runs locally in your browser.

How to Password Protect a PDF

  1. Upload or select a supported, unprotected PDF file.
  2. Enter your password and type it again in the confirmation field. The tool has no user-selectable permission, printing, copying, or encryption-algorithm settings.
  3. Choose Protect PDF to apply protection. Sign in if prompted, wait for processing to finish, then download the protected PDF. Keep your password safe and share it separately from the document.

Secure a PDF with a Password

  • Encrypt PDF with a password: Add a password to PDF content so a compatible PDF reader requires the password to open the protected document.
  • Password protect PDF files locally: Create a password-protected PDF in your browser. Your PDF and password are not uploaded to the server.
  • A simple way to lock a PDF: Select a file, enter and confirm your password, apply protection, and download the secured copy. This tool does not remove existing passwords.

Encryption may affect the validity of existing digital signatures. Review the protected file before sharing it. This tool encrypts supported unprotected PDFs; it does not unlock PDFs or remove passwords.

Protect PDF FAQ

How do I password-protect a PDF?

Select a supported, unprotected PDF, enter and confirm your password, then choose Protect PDF. Sign in if prompted and download the protected document when processing finishes. Keep the password safe and share it separately from the PDF.

Can I encrypt a PDF with a password?

Yes. You can encrypt a PDF file with a password using this tool. A compatible PDF reader requires that password to open the encrypted document. There are no user-selectable permission, printing, copying, or encryption-algorithm settings.

Can I protect a PDF from unauthorized access?

Password protection helps restrict opening the PDF to people who know the password. Use a strong, unique password and handle it carefully. Protection does not make a document completely secure: anyone with the password can access its content and may share it.

Is the Protect PDF tool free to use?

Yes. Get started with 10 free PDF jobs per month on the Free plan, shared across PrivatePDF tools. Each completed protection job uses one job. An account is required; free use is not unlimited.

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