How do I add a password to a PDF for free?

Upload your PDF on FreePDFConvert, enter your chosen password and click 'Protect PDF Now'. Download your password-protected PDF instantly.

What encryption does FreePDFConvert use for PDF protection?

We use AES-256 bit encryption, which is the industry-standard encryption used by banks and governments.

Can I remove the password later?

Yes, use our Unlock PDF tool to remove the password if you know the original password you set.

Is my PDF safe when I upload it to protect it?

Yes, all files are processed with secure HTTPS encryption and automatically deleted after conversion. We never store your documents.

Protect PDF with Password Free Online

Add strong password encryption to any PDF instantly. 100% free, no signup, no watermark required.

Select PDF to Protect

or drop PDF file here

Strong AES Encryption

Your PDF is protected with strong AES encryption. Without the correct password, the document cannot be opened or read by anyone.

Instant Protection

Upload your PDF, enter a password, and download your encrypted file in seconds. Works with any PDF regardless of size.

Fully Private

SSL encryption on all uploads. Your PDF and your password are never stored on our servers or shared with any third party.

How to Password Protect a PDF Online (3 Steps)

Step 1 — Click "Select PDF to Protect" or drag and drop your .pdf file into the upload area above.
Step 2 — Enter your chosen password in the password field. Use a strong mix of letters, numbers, and symbols for maximum security.
Step 3 — Click "Protect PDF Now" and download your encrypted PDF. No account, no email, no watermark.

Frequently Asked Questions

How do I protect a PDF with a password for free?

Upload your PDF above, enter your password, and click Protect PDF Now. Your encrypted PDF will be ready to download in seconds with no signup required.

What type of encryption is used?

FreePDFConvert uses strong AES encryption to lock your PDF. This is the same encryption standard used by banks and governments to protect sensitive data.

Can someone open the PDF without the password?

No. Once your PDF is password-protected, it cannot be opened or read by anyone who does not have the exact password you set.

Is the protected PDF compatible with Adobe Reader?

Yes. The protected PDF works with Adobe Acrobat Reader, Foxit PDF, Chrome's built-in viewer, and all standard PDF applications. Users will be prompted to enter the password when opening.

Is my PDF and password safe?

Yes. All transfers use SSL encryption. Your PDF file and the password you enter are never stored on our servers and are never shared with any third party.