Password Protect PDF Online

Customize a personal password to protect the safety of your PDF documents.
add file
Select file or drop file here
Your files are secure

Other PDF Converter Online Tools

Password Protect PDF: Safeguard PDF Files with Passwords

WorkinTool Password Protect PDF online provides users with the easiest method to put a lock on your PDF files. So that nobody can access your PDFs or edit the PDF content without the password. It offers the highest encryption technology to customers to safeguard their confidential documents.
watermark eraser icon

DeskTop Version Basic Features

Clear and Simple Interface
Clear and Simple Interface
Easily process your PDF encryption within seconds. With clear navigation, you can put a lock on the PDF files just as you like.
Online Version for All Platforms
Online Version for All Platforms
WorkinTool online version supports various platforms like Windows, macOS, Linux, iOS, and Android. Providing the best protection everywhere.
Smooth Processing Speed
Smooth Processing Speed
WorkinTool encrypts your PDFs with the fastest speed. Users only need to enter the passcode they want, and seconds later the PDF with a password is ready to download.
High-Quality Output
High-Quality Output
WorkinTool won't alter any layout or content for adding a password. The output PDF files will stay high quality as always.
Advanced Encryption Tech
Advanced Encryption Tech
WorkinTool cares about users' data safety and uses the latest 256-bit SSL/TLS encryption technology to protect all files. And WorkinTool won't keep users' passwords under any circumstances.
Auto Delete from Server
Auto Delete from Server
Your uploaded files will only be preserved on the server for 12 hours, and once expired, all files will be automatically deleted. Nobody will have access to your files.

Perfect for Any Industry

Education
Education
Add a password to the unused test paper document, cutting off the possibility of cheating before the test.It also reduces the bias toward educational inequity
Business
Business
WorkinTool aims to help business practitioners protect the security of their contracts and confidential data files, ensuring that competing companies cannot steal secret documents by illegal means.
Legal
Legal
In the legal profession, file encryption is commonplace. Usually, a document leak can lead to an unfair decision. So, WorkinTool provides a very handy way to lock your PDFs.

Desktop Software VS Online Tool

Desktop Software
Free Download For Win 11/10/8/7
No internet access required
Data privacy and information security are ensured
Faster conversion speed and better quality outcome
No ads involved
Traceable conversion records
Online Tool
Explore Now
No need to download, operate everywhere with Internet
Stable conversion speed and outstanding exporting quality
No backup for uploaded files, security is guaranteed
All popular office formats are supported to convert
Only four files at a time to convert
The maximum size of each uploaded file is 50 MB

How to Password Protect a PDF for Free

(Desktop Version)
0
First Step
Launch WorkinTool PDF Converter. Click "Protect PDF" on the right of the navigation bar.
0
Second Step
Click "Select PDF file" or "Drop files" into the operating area. Then, enter the password
0
Third Step
Hit "Protect PDF" to finish PDF encryption.
0
First Step
0
Second Step
0
Third Step
Launch WorkinTool PDF Converter. Click "Protect PDF" on the right of the navigation bar.
First Step
More Tutorials
what's new
What's New in Version 1.4.0.0 ?
New Features: Convert PDF to HTML, Edit PDF, Add page numbers to PDF
More Compatible Platforms: Windows 11

Editors' Review

WorkinTool PDF Converter

Start Your Free Trial Today!
No matter the online version or desktop version, WorkinTool always provides the best service to our clients with the function to Password Protect PDF. Come explore it now!
Free Download For Win 11/10/8/7