Free online PDF tool
Protect PDF Online Free
Protect a PDF with an opening password before sharing sensitive documents. The PDF encryption runs in your browser, so your file is not uploaded to a We Love Free PDF server.
Select files
Drop files here or choose from your device.
File privacy and limits
This tool is designed to process files in your browser where possible. That means your selected files are handled on your device instead of being uploaded to a We Love Free PDF server.
Very large PDFs can still be slow because your browser has to do the work. For a smoother experience, use smaller files when possible and always check the downloaded result before sharing it.
How to use Protect PDF
- Upload the PDF you want to protect.
- Enter and confirm the password you want to use.
- Click Protect PDF and download the password-protected file.
Why use this tool?
Protect PDF FAQ
Can I add a password to a PDF for free?
Yes. This tool adds an opening password to a PDF and downloads a protected copy.
What if I forget the password?
We cannot recover forgotten PDF passwords. Save the password somewhere safe before sharing the file.
Is this the same as a digital signature?
No. Password protection encrypts access to the file. It is different from signing a PDF.