FileGizmo — PDF tools
Protect a PDF with a password
Add standards-compatible AES-256 password encryption to a PDF entirely in your browser.
Never uploadedYour file stays on this device
Drop your PDF here or click to choose a file PDF file · processed on this device
Processing locally…
Your PDF is ready
Simple by design
Protect PDF in three steps
Add interoperable PDF password protection without a server round trip. A local qpdf WebAssembly worker writes standard AES-256 encryption, so the output remains a real PDF rather than a proprietary encrypted archive.
- 1
Choose an unlocked PDF
- 2
Enter and confirm a strong password
- 3
Encrypt and download the protected PDF
Good to know
Frequently asked questions
Which encryption is used?
The output uses PDF-standard AES-256 encryption through qpdf WebAssembly.
Can FileGizmo recover a forgotten password?
No. Keep the password safely; it is not stored or sent anywhere.
Will normal PDF readers open the result?
Modern readers that support PDF 1.7 AES-256 encryption can open it with the password.
Is the password uploaded?
No. Both password and PDF stay in the local browser worker.
Learn more
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