SysTools PDF Lock Software
Want to secure a PDF from unauthorized access or compromise? SysTools PDF Locker Software to lock PDF with a password, permissions, and intelligent encryption. Block text copying, printing, editing, and more in a single operation; no server upload & no Adobe installation needed. Works on Windows or macOS.
- Lock PDF Document with User Password & PDF Owner Password to Block Access.
- Restrict Action: Editing, Content Copying, Repurposing, Printing, Commenting, etc.
- Best PDF Password Protector to Protect PDF with Password and Permissions.
- Custom Create Strong PDF Password to Block Unauthorized Access.
- PDF Locker Tool Supports Encryption AES 256/ 128 and RC4-128/ 40.
- Lock Unlimited PDF Files in a Single Operation Using the "Add Files or Folder" Option.
- Smart Print Control Settings: Not Allowed or Low Resolution Printing in 150 DPI.
- Block Commenting, Page Extraction, Insertion, Deletion, Form Filling, in One Click.
- PDF Lock Software—100% Offline Utility; No File Uploaded on Web or Online Server.
- Password-Protect PDF Files without Using Costly Adobe Acrobat Tool.
- No Size Limitation; Download SysTools PDF Locker on Windows or macOS.
Free Live Demo - SysTools PDF Lock Software Fully Secured Download Version
Please Note - If security annoys you, use powerful PDF Unlocker tool to strip out protection from PDF files.
How to Lock a PDF File with Password in 4 Steps?
Best PDF Locker to Password Protect PDF without Installing Acrobat
Download Utility
To lock PDF file, launch SysTools PDF Password Protector on any Windows or macOS system.
Browse File
Click any "Add Files or Folders" to import sensitive PDF files in batch mode.
Define Protection
Choose "Apply Document Restriction, Apply Open Document Password, or Encryption Type" to secure PDF files.
Press Lock
Finally, use the Lock button to lock PDF files with user and owner protection permanently.
What Types of PDFs Can Be Password Protected?
PDF Lock Tool to Keep Your Sensitive Data Up to 99.9% Secure— Protect It Now!
Bank Statement PDFs
Invoices & Bills
Aadhar Card PDF
Legal Contracts & Agreements
PDF Forms
Journals & E-books
Credit Card Statement
Income Tax Return PDF
Form 16 PDF
Payslip PDF
Medical Report
Government Certificate
Key Benefits of SysTools PDF Password Protector Tool
Powerful Features to Lock PDF Files with Confidence & Ultimate Security
Lock PDF with Open/ User Password
To block document opening, use SysTools PDF Lock Software to secure a PDF with a strong user or open document password. No one can open the PDF without entering the right credentials.
Support Multiple Permissions
If you want to control document usage, download the best PDF Locker. It blocks content editing, page printing, copying, extraction, and more in one attempt; no need to apply password protection.
Apply Major PDF Encryptions
With SysTools PDF Password Protector, professionals can apply intelligent encryptions, such as AES 256, 128, and even RC4-128 or 40-bit, to ensure strong protection of sensitive files.
Print Protection Settings
Whether you want to disable printing of PDF or partially enable it, the PDF Protector tool offers print control settings, such as Not Allowed, Low Resolution (150 DPI), and High Resolution Printing.
No Server Upload - 100% Offline Tool
Since online PDF locker tools require server upload, there is a risk of data compromise. Use SysTools PDF Protector, a complete offline utility for batch-protecting documents.
Support Windows and Mac OS Platforms
Download the best Mac PDF Lock Tool Software on Windows or macOS with ease. With fast performance, owners can lock all confidential PDF files while maintaining file integrity.
Watch Quick Video to Learn How to Protect PDF Using PDF Lock Software
SysTools PDF Locker—Ideal Tool for Professionals, Businesses, and Research Students to Safeguard Document in Few Clicks!
Why Choose SysTools Mac PDF Locker Software to Protect PDFs
If you're wondering how to lock PDF on Mac, use SysTools PDF Password Protector Mac. This is professional, smart software that provides advanced security standards for PDF files. The tool offers batch processing and flexible PDF protection, such as password security, permissions, and strong encryption. Below are the steps to lock PDF files on Mac:
- Launch the best Mac PDF Lock Tool by SysTools on macOS.
- After this, use "Add Files or Folders" to access the document.
- Navigate to Change to set the path for output PDF > hit Next.
- Use the "Apply Open Document Password" function > create strong certificates.
- Finally, select the Lock function to protect PDF on MacBook.
Download Now for Mac
Safe & Secure
PDF Password Locker for Locking PDFs With Custom Restrictions
Is password protection enough for data protection? Not anymore. Many online tools are capable of compromising the document credentials. If you’re looking for more than password encryption, SysTools PDF Lock Software is for you. This robust tool is designed for document owners to take full control when sharing or archiving the PDF file. Using the PDF Password Tool, you can apply advanced restrictions like content copying, printing, editing, or document assembly—keeping the PDF tamper-proof file.
These permissions are known as owner passwords. This tool provides “Apply Document Restrictions” to control the viewer's actions. To lock PDF, this software offers multiple features, take a look below to know how it works:
- NOT Allowed: Choosing the NOT Allowed feature helps to limit the actions like editing, content accessibility, commenting, text copying, printing, filling form fields, signing, extracting pages, document assembly, etc. These restrictions prevent unauthorized users from directly accessing or misusing the data.
- Inserting, Deleting, and Rotating Pages: Selecting this feature allows users to insert, rotate, and delete the text for legitimate purpose. Besides this, the other actions like editing, printing, content copying, and more are disabled.
- Filling in Form Fields and Signing Existing Signature Fields: To enable the signing and form filling action, choose this feature. SysTools PDF Locker offers this amazing option allowing only signing and form editing in the document.
- Commenting, Filling Fields, Signing Signature Fields: PDF Lock Software provides the feature of commenting, form filling, and signing in the secured document. In this way, users can add a review or comments without modifying the entire PDF file.
- Any Except Extracting Pages: PDF Protector tool offers another demanding feature under the Changes section. Using this option, document owners can permit extracting pages while limiting the other necessary actions.
- Printing: The option of Apply Document Restrictions provides the feature of controlling the print action. Using the Printing - Not Allowed option, owners can stop viewers from making a copying of the document at once.
SysTools PDF Lock Software - Protect Your PDF With the Strongest Encryption Security
Worried about data leakage when distributing PDF documents? With SysTools PDF Encrypt Software, you can lock PDFs using powerful encryption. This PDF locker includes built-in encryption that effectively works against digital threats. Using the best PDF encryption method, owners can stop the accessibility, making it the ultimate solution for government authorities, businesses, enterprises, and more.
The robust standards of encryption are commonly known as AES (advanced encryption standards) that resist unauthorized intervention or attacks like brute force. Here are the types of encryption supported by the encrypt PDF tool:
- AES-256: The latest and ultra strong PDF encryption technique to protect highly sensitive data like financial records, government documents, legal, and more. This is the fastest and unbreakable security algorithm.
- AES-128: This software provides another encryption type, i.e. AES 128. It is an ideal security feature ensuring data protection and integrity. This PDF protection is a fast and reliable way to meet document security regulations like GDPR.
- RC4-128 & 40: SysTools Mac PDF locker offers RC4-128 and 40 bits protection. These encryption algorithms are comparatively slow, yet helpful to ensure the data security. It is mainly used to secure a document having copyrighted content.
Core Feature of SysTools PDF Locker Tool
Discover the Advanced Features of PDF Password Protector to Lock and Restrict Access
Independent & Trusted Software for Professionals
SysTools PDF Lock Software is an independent and standalone solution with smart features that empower businesses, professionals, students, and government authorities to control document access effortlessly. From financial reports to confidential PDFs, this tool provides high-level data security features to prevent tampering and modification.
One-Click PDF Locking - Easy PDF Protection
Unlike complex tools like Adobe Acrobat, SysTools PDF Password Protector software offers simple and multiple modes of protection for securing PDFs in just one click. It provides dual features i.e. Add Files or Folders to upload documents in batch mode. Many times, you accidentally add the wrong PDF, the “Remove” and “Remove All” can instantly delete those files.
Create a Strong PDF Password
If you want to make your document password, using this PDF locker tool, professionals or businesses can create strong PDF passwords for highly confidential data. This type of protection is commonly known as user and open password, blocking users from opening the document. Under the “Apply Open Password” you can set the passkey for the PDF File.
Lock Your PDFs With Custom Permissions
Passwords can be compromised due to advanced tools. To control document access, SysTools PDF Protector Tool offers extensive features to set restrictions. It prevents users from content modifying, printing, and copying. These permissions are typically called owner passwords. Using this tool, you can “Change Settings” to define restrictions.
User Vs Owner Password Protection
SysTools Mac PDF Lock Software offers a dual-protection mode to provide flexibility for users to control entire document access. The users password serves as the master protection to block unauthorized viewers from opening the document. On the other hand, owner password is best for restricting editing, page printing, text copying, and more.
PDF Encryption - The Ultimate Data Security
PDF Locker Tool is not just locking the document, this powerful software provides industrial-grade encryption support for 100% protection. In the digital sphere, where the threat of data exposure is lurking. With robust encrypted support like AES 128, 256, RC4- 128, and RC4- 40, you can safeguard data against malicious attempts.
Batch PDF Locking with Fast Processing
This PDF Locker is fast, cost-effective, and trustworthy for all professionals. Using this PDF locking solution, you can add PDF password protection in batch mode without losing metadata and originality. With no file size limitation, users can secure highly confidential information instantly and share documents across all platforms with peace of mind.
Available for Windows & Mac OS Users
Download SysTools PDF File Locker for Mac to protect PDF without password and user password. This smart software is available for Windows and macOS including the latest editions. With fast processing and improved performance, this tool is a highly reliable and professionally-favored utility for securing documents from data leakage and tampering.
Specifications of PDF Lock Software
Software and Hardware Requirement to Secure PDF File Using This Tool
(Windows OS)
| Name: | SysTools PDF Locker |
| Version: | 4.0 |
| Size: | 191.55 MB |
| MD5: | 92b45b0f35559682ab9e9a095e95601a |
| Delivery: | Free via Email |
| Free Version: | Download for Windows |
(Mac OS)
| SysTools Mac PDF Locker |
| 4.0 |
| 91.82 MB |
| 158fd459f716a71e057bc36eaea37092 |
| Free via Email |
| Download for Mac |
Trial Limitations: |
(Windows) Free PDF lock tool allows user to password protect 5 PDF files only with SysTools as watermark. To overcome this limitation buy PDF locker full version and activate it. |
(Mac) Free PDF password tool for Mac lets you protect up to 5 PDFs with SysTools as a watermark. To avoid this limitation, buy Mac PDF locker full version for unlimited, watermark-free protection. |
| (Windows) | (Mac) | |
| Hard Disk Space: | 100 MB of free hard disk space required | 100 MB of free hard disk space required |
| RAM: | 4 GB of RAM (4 GB is recommended) | 4 GB of RAM (4 GB is recommended) |
| Processor: | Intel® Core™ 2 Duo CPU E4600 @ 2.40GHz 2.39GHz | Mac Computer with Intel Processor Mac Computer with Apple Silicon (Apple M1) |
Platforms: |
(Windows OS) Windows 10 (64-Bit), Windows 11 (64-bit), |
(Mac OS) macOS X 11.0 (Big Sur), macOS X 12.0 (Monterey), macOS X 13.0 (Ventura), macOS X 14 (Sonoma), macOS X 15.0 (Sequoia) and above versions. |
Application Pre-Requisites: |
(Windows)
|
(Mac) |
Product Guide: |
(Windows) |
(Mac) |
User Control
FAQs
Electronic Delivery
Software Customization
If you need to customize PDF lock tool or need additional features then, Request Quote
Compare: Demo Vs Pro PDF File Locker
Understand Difference Between Free and Full Version Software
| Features | Free Version | Full Version |
|---|---|---|
| Bulk Processing of PDF files | ||
| Add File / Add Folder Options | ||
| Lock PDF Permissions | ||
| Windows & Mac OS Versions Supported | ||
| Supports all PDF Versions | ||
| Lock PDF File with Strong Password | ||
| Saves Resultant Locked PDF | Only 2 PDF Files | |
| Lock without 'SysTools Demo' Watermark | ||
| Cost | FREE | $29 |
PDF Password Protector Tool - FAQs
Listed Commonly Asked Questions and Answers
Here are the quick and simple steps to execute the process:
- Launch the PDF Locker software on your system
- Click Add File / Add Folder to load PDFs
- Set the preferred destination for resultant files.
- Apply permissions and passwords of your choice.
- Finally, click the Lock button to restrict PDF files.
This utility provides seven types of restrictions which are Edit, Copy, Comment, Fill, Sign, Print, and Extract Page.
It absolutely does! It supports numerous PDF encryption tool including AES 256-bit, AES 128-bit, RC 440-bit, and RC 4128-bit.
Yes, it does. This astonishing PDF password lock software supports processing all versions of PDFs whether the latest or older.
Yes, this utility provides the option to users to apply both or either of the permission or document open passwords. One can apply the passwords as per their preference.
Yes, there is! This PDF protection utility provides an option to keep your source document password the same. To activate the feature, simply enable the checkbox for the “Keep Source Document Password Same” option.
Using the demo version, you can process and encrypt two PDF files. Moreover, the resultant files will contain the “SysTools Demo” watermark. To lock an unlimited number of files without a watermark, opt for the full version.
