Protect PDF
Choose a PDF file or drag it here
Files stay on your device. Never uploaded.
Free · Unlimited use · No signup
Selected files
Check the file and settings, then try again. You can also choose another file.
Encrypt PDF with AES-256 password protection. Secure sensitive documents and prevent unauthorized opening of the file.
How to use Protect PDF
- Select the PDF document you want to protect.
- Enter a password that will be required to open the protected PDF.
- Create and download the encrypted PDF, then store the password safely.
Frequently Asked Questions
What encryption does this tool use?
The tool protects PDFs with AES-256 encryption.
Is my password stored?
No. Password protection is applied locally in your browser, and the password is not uploaded to innoPDF.
Can I open the protected PDF without the password?
No. You need the password you set to open the protected result file.