PDF tools
Password Protect a PDF
Add a password so only people who know it can open your PDF. Strong AES-256 encryption, done on your device.
How It Works
- 01
Upload
Choose a PDF.
- 02
Set a password
Type it twice.
- 03
Download
Save the protected PDF.
When to password-protect
- Payslips, contracts and bank statements
- Medical or legal documents
- Files sent by email
How it works
Fylix uses QPDF, a widely used open-source PDF tool, running inside your browser. The PDF is encrypted with AES-256, which all modern PDF readers support.
Frequently Asked Questions
No. Every Fylix PDF tool runs in your browser, so your files stay on your device and are never sent to our servers.
No. Nobody can — not even Fylix. Keep the password somewhere safe.
Yes. The PDF tools are free to use and don't require an account.