PDF SECURITY TOOL

PDF Locker

Password protect or unlock a PDF directly in your browser. Your document is processed locally and is never uploaded to our server.

🔒 AES-256 protection🖥 Browser processing☁ No PDF uploads

PDF

Drop your PDF here

or click to choose a file

PDF files only · processed on your device

Password to open PDF

Confirm password

Password strengthUse 8+ characters

Advanced permissions

Owner password (optional)

Allow printing Allow copying Allow editing Allow comments

Protect PDFs without uploading them

PDF Locker runs the PDF security operation inside your browser using WebAssembly. The selected PDF is placed in a temporary in-memory filesystem, processed, downloaded by you, and removed from that temporary workspace.

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Strong encryption

Creates standard AES-256 encrypted PDF files compatible with modern PDF readers.

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Private by design

Your PDF content is not sent to Tech Wave Cloud for processing.

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Fast processing

No upload or server download cycle. Processing happens on your own device.

Frequently asked questions

Does Tech Wave Cloud upload my PDF?

No. PDF processing takes place in your browser.

What encryption does PDF Locker use?

The Lock PDF feature uses QPDF's 256-bit PDF encryption option.

Can I unlock a PDF if I forgot the password?

No. Unlock PDF requires the correct existing password and is intended for documents you are authorized to access.

Will the locked PDF work in modern PDF readers?

The generated file uses standard PDF password encryption.