Secure your secret PDF documents with strong password protection using FusioFiles. Our free online tool allows you to encrypt your files, ensuring that only authorized users can open them. We use advanced lock standards to protect your data. Since the lock happens directly in your browser, your unencrypted files never leave your device, guaranteeing 100% privacy. Protect bank statements, contracts, and personal records in seconds. No software installation or registration required.
Privacy Protected
Protect PDF
Encrypt your PDF with a password to prevent unauthorized access
Select PDFs to Lock
Privacy First • No Uploads • 100% Client-Side
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Password Protect PDF Online for Free
Protect your PDF files with a password for free. Add lock and security to secret documents. Client-side processing ensures privacy.
1
Upload PDF
Select the secret PDF document you want to protect.
2
Set Password
Enter a strong password to encrypt the file.
3
Encrypt
Click the button to apply lock instantly.
4
Download
Download your securely encrypted PDF file.
Frequently Asked Questions
We use standard PDF lock methods compatible with all major PDF readers.
No. Since we don't store your files or passwords, we cannot recover a lost password. Please remember it carefully.
You don't upload files to a server. FusioFiles processes everything locally on your device, so your data stays with you.
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