How to Lock PDF Files
Portable document format, otherwise known as PDF, is one of the most preferred formats to share documents with others. Working professionals prefer using PDF because it is a trustworthy format. Having said that, just like other formats, PDFs can be altered, edited, modified, and printed as well unless you lock PDF. When you lock a PDF file, it will become challenging for unauthorized people to view or read the PDF file's content. If you are wondering how to lock a PDF file, you have come to the right place. Don't let anyone get hold of your sensitive data and information; read this article to know how you can lock your critical PDFs in different methods.
Method 1: How to Lock PDF Files with Password
The answer to your question about how to lock PDF with a password will become easy when you use the best PDF lock tool. One tool, which is gaining immense popularity in the industry is PDFelement. The impeccable performance of this tool makes PDFelement highly trustworthy. Please note that this is offline software; hence you will have to download and install the software on your computer or laptop. About its robust features, you can use PDFelement to edit, annotate, print, OCR, create and convert any PDF files. Now, let's get to know how to lock a PDF file with a password in simple steps.
Step 1. Open File
Launch PDFelemen and click on the Open Files option that you see on the home screen. There will be many other options as well, but because our concern is to lock PDF documents, click on the Open Files to extract the PDF file to the software. You can drag and drop the file, else select them manually.
Step 2. Lock PDF with Open Password
You will be redirected to another page with a toolbar on the top. Look for the Protect option. It will be the second last option on the toolbar. Click on that, and then click on the Set Password option. This is the option to go for to lock PDF documents. A small window will appear with security written on it. The security page will have two options, Open Password, and Permission Password. If you simply want to add a password, tick on the checkbox beside Open Password and enter the password you want to use.
Step 3. Lock PDF with Permission Password
Fill in the details for Permission Password. There will be a checkbox beside Permission Password; click on it, and enter the password you want to use. Below that, you can even limit the usability of the PDF, such as you can restrict printing and changes. If you want copying of text and images to be allowed, tick on the checkbox. Select the encryption level that you want to go for.
Step 4. Save Locked PDF File
After you are satisfied with the changes you have made, click on the File option, and from the drop-down menu, select Save to save the changes.
Method 2: How to Lock PDF Files with Signature
There's another method to lock your PDF document, and that is by signing your document digitally. The process is fairly simple too, and we will guide you on how to lock a PDF file with a password.
Step 1. Open PDF File
Just like method one, launch PDFelement on your system. Click on the Open Files option to select the PDF file that needs protection. Open the file with PDFelement.
Step 2. Sign Document
Yet again, you will be redirected to another page. Click on the Protect option, which is the second last option on the toolbar. Now, rather than the Set Password option, you need to select Sign Document. After clicking on that, a new window will pop up on the same page. You will see a short form that you need to fill. Click the tab for Sign As and enter your signature. Then, click on the Sign option towards the bottom right to save your signature. Finally, click on the File option, and from the drop-down menu, click on the Save option to save the changes. Just two steps to follow, and you will be able to sign your PDF document, and this is your answer to how to lock a PDF document.
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