What Is This Tool?
Protect PDF adds a password to a PDF so it can only be opened by people who know it.
What Can You Do With It?
Share private documents more safely. Protect invoices and contracts.
How Does It Work?
The PDF is encrypted in your browser with standard PDF password security before you download it.
Key Benefits
Encryption happens on your device. No account needed.
Limitations and Important Notes
Forgotten passwords cannot be recovered. Already locked PDFs must be unlocked first.
Privacy and Security
Files are processed inside your browser on your own device. They are not uploaded to Adobe IQ servers, and the result is created locally for you to download.
Real-World Example
Protect a contract with a password, then share the password with the recipient separately.
Frequently Asked Questions
What if I forget the password?
It cannot be recovered, so keep it somewhere safe.
Does the PDF still work in normal readers?
Yes. Any standard PDF reader asks for the password.
How should I share the password?
Send it separately from the file, for example by phone.
Related Tools
How to use this tool
- Upload a PDF.
- Enter a new password of at least 4 characters.
- Click Process file and download the protected PDF.