According to the PDF Association, PDF has now developed into the third largest and most common file on the Internet Format, second only to HTML and XHTML. In fact, millions of PDF files in the world are now used. And this number continues to surge every year.
However, more PDF users will lead to higher security risks. This is why you should learn how to use passwords to protect your PDF online to ensure their maximum security.
The question is, if you are not a proficient person, how can you do this? Fortunately, you can do this without any coding skills. You only need to find the right tool to help you protect the PDF password online.
Let’s take a look!
- What is the online PDF password protection tool?
Why use passwords to protect the online PDF?
#1 PPWP Professional Edition
#2 Adob \u200b\u200bE Acrobat
#3 Small PDF
#4 PDF2GO
# 5 soda water pdf
#6 ILOVEPDF
#7 Seda
#8 Smart PDF
#9 SmallSeotools
# 10 PDFCANDY
Reward: Select the prompt of a strong password
What is the online PDF password protection tool?
They are usually online software or applications, which aims to restrict the use of password access to your PDF file.
In short, these tools allow you to enter a password for PDF. Therefore, only people with the correct key can check, copy, print or edit your files. In this way, you can prevent your valuable content without authorization.
It is great that you can use them without any technical knowledge. It is more than enough to have basic computer skills. Just click a few times to protect or encrypt your PDF online.
Why use passwords to protect the online PDF?
There is no doubt that data security is the most concerned issue for most PDF users. One of the most effective ways to get rid of cyber crimes is online password protection PDF. The password provides the first line of defense for the unexpected entries in your PDF. Therefore, they will help you
ensure your data privacy
. If one day you find that someone can access your personal or sensitive information, it may be a nightmare. Therefore, you should keep a strong password for all important PDFs on the computer. The stronger your password, the higher the security of your PDF file, and the attack on hackers and malware.
Please remember that there are a large number of such tools on the market. You may be difficult to determine. In order to help you make a wise decision, we show you two methods to protect PDF to protect PDF. And the top 10 selection tools that achieve this goal.
So, let’s take a look!
There are two main methods for the PDF to protect PDF online
Online password protection PDF has two main methods.
If you want to use a password to protect PDF on your WordPress website, you must install a plug -in providing this feature.
- If you want to use a password encryption PDF on your computer, there are other free online tools for you to perform this operation.
#1 PPWP Professional Edition
Password Protect WordPress (PPWP) Pro is one of the most trusted PDF tools in WordPress. It received more than 20,000 activities installation, and due to its excellent features, this number is still increasing. With the support of this plug -in, you will be able to:
PPWP Pro plug -in contain To protect your files. You only need to add a file URL to be protected. The plug -in will complete all the tasks from generating passwords to management passwords. After the file is protected, if someone tries to access its URL, they will see the password form shown in the figure below:
You can limit the file through user roles, use restrictions or password expirationsAccess.
User role 
: By default, anyone with a password can unlock the protected files. You can change the settings to ensure that only users with specific characters can access them.
Use restrictions
- : You can set the maximum number of uses of the password.
- Expired time
- View a detailed guide on how to use intelligent restriction passwords to protect WordPress files.
: You can limit the use time of the password. In short, after the given time, readers will not be able to use it to access the protected documents.
PCF PPWP Pro plug -in and PDA (prevention of direct access) GOLD seamlessly integrated, using simple code protection to protect files embedded in your content. To explain, once published, your content will be shown below:
Similar to the above features, you can set the password expiration time and limit for the file settings.
Please refer to our password protection of how to protect the files embedded in the content part.
Password protection in PDF is very important. If you are worried about setting a password for the PDF file in Adob \u200b\u200bE Reader, you no longer need to worry.
#2 Adob \u200b\u200bE Acrobat
This is the first tool for online password protection PDF. As an inventor in the PDF file format, Adobe guarantees the security of trustworthy documents. It helps to use passwords to protect your PDF with any browser on any browser on Mac or Windows.
Main features : Use the password to use the password Protect PDF file
Let you know if your password is weak, medium password or a strong password.
Price
- : Free. If you need more advanced PDF security, you can use Adob \u200b\u200bE Acrobat Pro DC for $ 14.99 per month. It will allow you:
- Add encryption options
Use certificate encryption
Change the security settings and permissions to limit editing, printing or copying
Edit pdf
- Sort the pdf page [ 123]
- #3 small pdf
- If you want to know how to know how to know how to do without an Acrobat Using a password to protect the PDF file, please don’t hesitate anymore. With SmallPDF, PDF is protected by password protection. You can enter a password on any PDF file you choose and make sure no one can get it.
Convert PDF to any Microsoft file type
Main features
:
Use the password to use the password Encrypted PDF to prevent unnecessary access Use a secure SSL connection to transmit all files and passwords Apantly delete files after an hour
Delete the password immediately after processing
[[ [ 123] Support all platforms such as Mac, Windows, and Linux
PCF files in the password
- : Free.
- #4 PDF2GO
- SSL encryption, regular server cleanup, security upload and are the key to using this tool. In addition, as long as you connect to the Internet, you can protect your PDF on anywhere, desktop, mobile device or tablet.
Price
Main features :
Use the password to encrypt your PDF file
Use the PDF file to protect PDF files in the password protection PDF file in URL, Dropbox or Google Drive 
Set the password to limit the permissions, such as preventing printing, copying or editing
Price
: Free. It also offers a high -end version with high -level functions and unlimited files, $ 6.50 per month.
- #5 soda pdf
[12]3]
This is another wonderful tool for protecting PDF with passwords to restrict editing. When an unpopular reader tries to access your files, they must enter the correct password to open and edit documents. In addition, it also allows you to the desktop version to perform this operation offline.
Main features : Use password encryption and protecting PDF Links to your file through emails. The link is only in Effective within 24 hours
Restriction, copy and print file permissions
Add digital signature 
Price
: Free. Or you can install the UNLIMITED Access version of $ 13.06 per month.
#6 ILOVEPDF
Don’t you know the computer very much? no problem. ILOVEPDF can be considered the simplest online PDF password protection tool. Users like it because it can be obtained online, so there is no need to and install it on your computer or mobile device. The most important thing is that it is compatible with all platforms and has a user -friendly interface. So you will not encounter any setbacks.
Main features:
Password protection PDF files and PDF files in Dropbox or Google Drive
support 25 languages \u200b\u200b
Automatically remove all archives in 2 hours
to ensure high -speed file processing Price : Free.
#7 Seda
- Sejda is another popular online password protection PDF tool, which allows users to easily view and manage PDF files. As long as you have an Internet connection, you can access it from any platform at any time.
- Main features
The reason why the tool is an excellent choice for everyone is that it provides incredible security functions. In addition to simply encrypted your files, Sejda also ensures complete control of them in various ways, which has a lot of action.
:
password protection PDF file, Dropbox file and Google DrivE file
After 2 hours, automatically delete files
Connecting security upload files by encrypted connection
Use owner password editing document (optional)
Selected should be Allowed PDF function. For example, you can restrict printing, or you can disable the form and comment.
Price
: Free. The price of advanced features is $ 7.50 per month.
- When using this tool, there are two main types of PDF passwords: turn on the password and the owner password.
#8 smart PDF
The open password is the strongest protection, and they are unlikely to be cracked. If the user wants to read the file, they must enter the correct password.
The owner’s password is weak protection, which can prevent readers from copying, editing or printing your files. However, it may be bypassed by some PDF software.
Main features : Use the opening password and the owner’s password to protect PDF to ensure 128 -bit encryption
Adobe The \”copy and print\” button in Reader becomes gray
After 30 minutes, delete the uploaded file from the server 
Use SSL to connect to the transmission file
Price
: Free.
#9 SmallSeotools
You can find another PDF password protection online tool provided by SmallSeotools. There is no better way to protect PDF Mac or Windows from editing password protection.
- Use this tool, the password seems to be the core. However, the truly secure PDF document is encryption.
Main features
:
Use password encryption PDF file
to protect them by merging multiple PDFs
Directly Upload PDF files from Google Drive and Dropbox
Stop junk through recaptcha Price : Free.
#10 pdfcandy
You can use PDFCANDY to protect PDF without installing a third -party application. You can connect to any corner of the world through Internet.
- This is one of the most reliable online PDF password protection tools. When using, the privacy of uploading documents will remain at the highest level. In addition, their content does not need any other purposes other than the purpose.
- Main features
- Set password on PDF documents
:
and Dropbox and Google Drive integration
drag and drop and drop Upload file
Price
: Free. 
Reward: Select the prompt of a strong password
Note: To establish a strong password, you should increase the password length to at least 10 characters. In addition, try to add mixed letters (uppercase and lowercase) and numbers. Adding symbols can also enhance the password strength.
Note: When selecting a password, avoid common words that are easy to guess in personal information or dictionary.
Immediately began to use the password to protect your PDF online!
This article recommends 10 excellent online PDF password protection tools. Most tools are free and easy to use. Although it does not require too much effort and resources, you can ensure the highest security of PDF files.
- Each tool has its own uniqueness. Your work is just a product that meets your needs and requirements. It will help you overcome unauthorized access.
- So don’t wait any more, let’s start now!