Lock PDF

Lock a PDF with a password without logging in. Set your password, protect the file, and download. No account, no upload to cloud.

Drag & Drop PDF File Here

or

No file selected.
Security Options

Setting a Permissions Password enables the options below.

User Permissions (If Permissions Password is set):
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Step-by-Step Guide

Lock & Password Protect PDF

Secure your PDF documents by adding user/owner passwords and custom encryption restrictions like disabling copying or printing.

1
Upload PDF File

Select the PDF document you want to encrypt from your local device.

Select PDF Drag & Drop
2
Set Access Password

Define a user password required to open the document, or set an owner password for permissions.

User Password Owner Password
3
Define Restrictions

Choose whether to block page printing, text copying, editing, or form filling operations.

Block Printing Restrict Copying
4
Export Secure PDF

Generate and download the encrypted PDF file directly to your local storage.

Encrypted Export Save Secure PDF
Local sandbox processing
Military-grade AES encryption
100% Private offline session
Security Tools

Standard PDF Security & Restriction Locks

Block unauthorized access, printing, and text copying with strong military-grade encryption standards.

Dual Passwords

Configure separate open passwords for viewers and permission passwords for content editors.

Action Restrictions

Toggle restrictions to stop viewers from copying text sentences, printing pages, or altering content fields.

Standard Cryptography

Uses standard 128-bit or 256-bit AES encryption to ensure files remain completely locked outside the browser.

Local Encryption Engine

Files are encrypted entirely within your browser sandboxed environment, so your documents never touch a server.

Restricts document printing, copying, and text edits
Encrypted locally using standard PDF security libraries
Zero cloud server uploads to guarantee full data privacy
FAQ

Common Questions

Find answers about PDF passwords, restriction overrides, standard compatibility, and privacy.

What is the difference between a User Password and an Owner Password?
A User Password (or open password) is required to open and view the PDF. An Owner Password (or permissions password) is used to control restrictions like printing, copying text, and modifications.
Can viewers bypass text copying restrictions?
Major standard-compliant PDF readers (like Adobe Acrobat or Google Chrome) respect these permission settings, blocking text selection and copy commands automatically.
How strong is the encryption used to lock the PDF?
The utility utilizes standard AES (Advanced Encryption Standard) algorithms to secure the files, making the password protection mathematically secure.
What happens if I forget the password?
Because the encryption runs client-side and we do not store your passwords or files on our servers, there is no way to recover or reset a forgotten password.
Are my confidential files uploaded to a server?
No. The password protection and encryption are executed entirely in your local browser sandbox via JavaScript. Your files never leave your computer.