Lock PDF

Password-protect and restrict permissions on your PDF documents.

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):
Share this Tool

Spread the word to help others work faster!

Related Tools

Add Page Numbers to PDF

Add page numbers to your PDF documents. Designed for quick payroll and financial checks.

Add Watermark to PDF

Stamp text or image watermarks onto PDF pages. Designed for quick payroll and financial checks.

CSV to PDF

Convert CSV spreadsheet data to a PDF document. Designed for quick payroll and financial checks.

Compress PDF

Reduce PDF file size without quality loss. Designed for quick payroll and financial checks.

DWG to PDF

Convert AutoCAD DWG files to PDF documents. Designed for quick payroll and financial checks.

Delete PDF Pages

Remove unwanted pages from your PDF files. Designed for quick payroll and financial checks.

EPUB to PDF

Convert EPUB e-books to PDF documents. Designed for quick payroll and financial checks.

Excel to PDF

Convert Excel spreadsheets to PDF format. Designed for quick payroll and financial checks.
Document Protection

Lock Your PDF with Password Security

Encrypt your files, enforce reading passwords, or restrict copy/print permissions in seconds without uploading anything to external servers.

1

Select File

Upload the PDF document you want to secure from your local device.

2

Define Password

Input an open password, an owner settings password, or set both controls.

3

Select Restrictions

Disable printing options, restrict layout editing, or block text copy commands.

4

Secure & Save

Encrypt the document and download the new password-locked PDF file.

Dual Passwords Support
AES 256-Bit Protection
Client-side Encryption
Secure Lockout

High-Grade Cryptography & Rules Enforcement

Open Lock Access

Require users to enter a secure password before they can access the document's content.

Restrict Operations

Limit actions like printing, structure modifications, extraction, and form submissions.

Standard Encryption

Employs powerful crypt algorithms (128-bit RC4 and 256-bit AES encryption schemas).

Print Quality Settings

Specify if printing is blocked, allowed in low-resolution draft, or unrestricted.

Sandbox Isolation

All cryptographic routines are computed client-side, ensuring your passwords are never sent over the web.

Locking FAQs

Frequently Asked Questions

1 What is the difference between an Open Password and a Permissions Password?
An Open Password requires a viewer to input a password just to open and read the file. A Permissions Password locks administrative actions like editing, copying text, or printing while letting anyone view the document.
2 Is my chosen password secure on this website?
Yes, completely. All password encryption routines are compiled locally inside your web browser. Your credentials and documents are never sent over the internet or logged on any server.
3 Can I lock a PDF that has already been password protected?
Yes. However, you will be prompted to type in the existing password first. Once authorized, the tool decrypts the file locally so you can assign new settings or passwords.
4 What cryptographic standard is used to lock files?
We employ standard PDF security definitions including 128-bit RC4 key encryption or high-security 256-bit AES (Advanced Encryption Standard) encryption, compliant with professional viewing apps.
5 Can I recover my password if I forget it?
No. Since we prioritize privacy and do not record passwords on any server, we have no way to retrieve or reset forgotten passwords. Make sure to keep a copy of your passwords in a safe place.