What encryption does this PDF Locker use?

AES-128 bit encryption — the industry standard used by most professional PDF tools.

Can I lock a PDF for free?

Yes. Password protecting a PDF with WebGati is completely free with no file size limits.

Is the password added on WebGati's servers?

No. All encryption happens in your browser. Your PDF and password never touch any server.

Can I set different passwords for opening and editing?

Yes. Set a User Password (to open) and an Owner Password (to restrict editing/printing) separately.

Can I remove a password from a PDF?

Yes — if you know the current password, you can use the unlock option to remove protection.

What happens if I forget the password?

Encrypted PDFs cannot be unlocked without the password. Store your password safely.

Enterprise Content Security

File Protection & Lock

Deploy military-grade AES-256 encryption. Control permissions, add identification watermarks, and secure your digital assets globally.

Select PDF to Lock

Client-Side Secure Encryption

Alternative Security Node

If you require industry-standard processing for complex PDF structures, use our secondary high-fidelity bridge.

Protect your file with WebGati

AES-256 Core

Industry standard encryption used by financial institutions globally.

Zero Knowledge

For native processing, your data is locked locally and never stored.

Granular Controls

Disable printing, copying, or modification with a single bit flip.

PDF Locker — Password Protect PDF Files Free Online

4.9/5

(Based on 2431 positive reviews)

WebGati's PDF Locker adds strong AES-128 password encryption to any PDF document, securing it from unauthorized access — all directly in your browser without uploading your file. You can set both a user password (required to open the document) and an owner password (controlling editing and printing permissions). This tool is essential for lawyers protecting client documents, HR teams securing salary files, businesses locking confidential reports, and anyone who needs to prevent unauthorized PDF access. Your sensitive PDF never leaves your device during encryption.

Power users often combine this utility with our PDF Merger and PDF Shrinker for maximum efficiency.

How to Use PDF Locker (Step-by-Step)

1
Upload Your PDF
Select your PDF file by dragging it in or clicking the upload area.
2
Set Your Password
Enter a strong password in the User Password field. Optionally set an Owner Password to restrict editing.
3
Choose Permissions
Optionally restrict printing, copying text, and editing the document.
4
Lock and Download
Click Protect PDF. Download your encrypted, password-protected PDF.

Key Features of PDF Locker

AES Logic
User Lock
Owner Lock
Pro Permission
100% Free — No Account Required
Browser-Based — Zero File Uploads
Works on Mobile, Tablet & Desktop
No Watermarks, No Limits

Common Use Cases

→Protect confidential business reports
→Lock salary slips before emailing employees
→Secure legal documents and contracts
→Protect client proposals from unauthorized access
→Lock exam papers before distribution

Frequently Asked Questions

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