Add Password to PDF - mypdf.guru

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Supports: PDF files (locked or unlocked)

Current password (only if your PDF is already locked)

Locked PDFs need the current password to re-encrypt with a new one.

New password

Strength: -

Tip: Use 12+ characters with letters, numbers and symbols.

Confirm new password

Passwords must match.

Encryption level If your browser struggles, switch to 128-bit.

Secure processing with no sign‑up. We don’t store your files.

How to add a password to a PDF

Drag & drop a PDF or click the upload area. Locked PDFs are supported too.

Enter and confirm your new password. If the PDF is locked, enter the current password too.

Click “Add Password & Download”. We’ll secure your document with strong encryption and prepare it for download.

Save the password-protected PDF to your device.

Is it safe to add a password to a PDF online?

Yes. Your PDF is processed securely and we don’t store your files after you download the protected PDF.

Can I add a password to an already locked PDF?

Yes—if you know the current password. Enter it, then set a new password and download the re-protected PDF.

Will quality or content change?

No. This tool only adds encryption. Pages and content remain the same.

Does it work on mobile?

Yes. The interface is fully responsive on phones, tablets, and desktop.