How to lock a PDF from editing
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How to lock a PDF from editing? (4 Easy Methods)

Locking a PDF from editing ensures your sensitive information remains confidential and safe from unauthorized access. Whether you’re looking to protect business documents or personal files, using Adobe Acrobat Pro DC or online PDF software can be your go-to solution.

Here’s a straight shot at how to password-protect your PDF documents: open your PDF in Adobe Acrobat Pro DC, head to the “Protect” toolbar, and select “Encrypt” with a strong password. Remember, a good password should contain at least six characters, mixing letters, numbers, and symbols to beef up security.

By restricting access and editing permissions, you effectively lock your PDFs, making them read-only files that safeguard your confidential or sensitive data. This method not only prevents users from making changes but also discourages unauthorized copying and printing, keeping your documents in pristine condition.

In this blog, we are going to learn how to protect your PDF against prying eyes successfully.

How to flatten a PDF in Adobe Acrobat (3 Methods)

How to lock a pdf from editing?

There are many ways to lock pdf from editing. Here are some:

Method 1: Lock a PDF Document Online

To restrict editing a PDF file, easiest way to lock a pdf is to encrypt it, You can use our Kwebby’s Encrypt PDF Tool here and upload your PDF file to create password protected pdf;

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You can also upload 2 or more multiple Files, then next type your password in “Type a Password” form to password protect to lock a PDF;

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Next, click on “Convert Now” to start protecting PDFs, After successful Conversion, You will get your Locked PDF file as below;

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You have different ways to get PDF file as below;

  • Download the File

  • Save to Dropbox

  • Save to Google Drive

  • Email Locked PDF

Method 2: Use Adobe Acrobat Pro DC to Add Password Protection

To safeguard your PDF files from unauthorized modifications, the editing restriction feature becomes crucial. This feature prevents users from modifying text, relocating items, or inserting form fields, although it allows filling out form fields, signing, and commenting.

When working with the file in Adobe Acrobat, follow these steps to activate protection:

Access the PDF in Acrobat, then select one of the two pathways: Navigate to “All tools” > “Protect a PDF”, and then choose “Protect with password” from the toolkit on the left. Alternatively, for macOS users, click on “File” > “Protect Using Password”.

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If prompted, affirm your choice to alter the security settings by selecting “Yes”.

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Opt for “Editing” in the next step, and enter your chosen password twice for verification. Your password must comprise at least six characters, and its strength (weak, medium, or strong) will be indicated alongside to ensure optimal security.

Click on “Apply”. A confirmation message from Acrobat confirms the successful activation of password protection on your document.

By following these steps, you can effectively lock your PDF documents.

Method 3: Lock a PDF in MacOS

Preview stands as the go-to app on MacOS for not only opening and viewing but also for implementing security measures on PDF documents.

To effectively lock a PDF on macOS and safeguard its contents against unauthorized editing, follow these streamlined steps:

Launch the PDF document using Preview.

Head to the “File” menu, then select “Export”.

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Ensure “PDF” is selected as the file format.

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Tick the “Encrypt” checkbox and proceed to input a strong password in the designated “Password” field. It is crucial that this password combines letters, numbers, and symbols, with a recommended length of at least six characters for enhanced security.

If you have an older MacBook, then you need to click on “Permissions” and select “Require password to Open PDF file.”

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For verification, you’re prompted to re-enter your password.

Determine where you’d like to save this now-secured PDF document by selecting a location, then click “Save”.

Method 4: Protect PDF Files using Microsoft Word

To convert entire pages of PDF to protected PDF file, then you can do it easily with the help of Microsoft word.

Open your PDF document in Microsoft Word in editable format or settings to restrict access, click on view and property settings;

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Next, Click on the Protect Document security method as below;

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Next, Click on the “Protect Document” option and select “Encrypt With Password” from the drop down menu;

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Next, type your password for securing PDFs and click on “Ok”

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Now you have a set password, and your locked PDFs are successfully protected.

More PDF Resources

Checkout our PDF Tools;

Basics of password security

Securing your PDF document is crucial for keeping confidential information safe from unauthorized access. By implementing PDF password protection, you can control who accesses your PDF by utilizing two types of passwords:

  • Document Open Password: This password, often referred to as a user password, is required for a user to access the PDF file. It ensures that only individuals with the password can view the PDF’s content.

  • Permissions Password: Often considered the primary password, this allows the owner to set restrictions on the PDF file. With a permissions password, you can limit actions such as printing, editing, and copying within the PDF. While this password does not prevent the opening of the document, it is essential for altering any restrictions set by the document owner.

Even though users can still save copies of the PDF, these copies will carry the same restrictions as the original file. It’s possible to secure a PDF with both password types, providing flexibility in access and restriction control. The document can be accessed by either password, but modifying restricted features requires the permissions password. Introducing both passwords enhances the document’s security, making it more robust against unauthorized editing and access.

It is an essential practice, to lock multiple PDFs, particularly when handling sensitive or confidential data. By using Adobe Acrobat Pro DC or other online PDF software, you can ensure your documents remain in a read-only mode, preventing unauthorized users from altering or compromising the integrity of your PDF documents.

Lets move ahead for learning how to lock a PDF from editing and protect PDF files through effective password protection and restriction settings.

Frequently Asked Questions (FAQs)

How To Remove password security in Adobe?

Removing security from an already open PDF document is feasible if you possess the necessary permissions. For PDFs safeguarded with server-based security policies, altering these settings is exclusive to the policy creator or a server administrator.

To proceed, open your PDF and follow the path of All tools > Protect a PDF > Set security properties. Within the Document Properties dialogue, shift to the Security tab and opt for Change settings.

The subsequent steps hinge on the nature of the password protection previously established:

  • Should the PDF be shielded solely by a Document Open password, uncheck the Require a password to open the document box and confirm by clicking OK, effectively stripping the document of this password layer.

  • In instances where a Permissions password was applied, unchecking the Restrict editing and printing of the document box is necessary. Upon being prompted, enter the permissions password in the Enter Password field then validate your action by selecting OK. A final OK selection confirms the security adjustment.

These methods highlight the importance of password protection and password protected PDF maintenance to ensure that sensitive or confidential information within PDFs is appropriately safeguarded.

How to encrypt a PDF with a certificate?

To initiate the encryption process with a certificate for your PDF document, follow these steps:

  1. Begin by opening your PDF file in Adobe Acrobat. You can achieve this by navigating through File > Open within the Adobe Acrobat software, or by right-clicking the PDF file in your file explorer and selecting Open with > Adobe Acrobat. If Adobe Acrobat is not already installed on your computer, you have the option to download a 7-day free trial from

  2. Once the document is open, go to the Tools option, which you can locate towards the top right or left corner of the Adobe Acrobat interface. A menu will appear upon selection.

  3. Within this menu, click on the Protection option to access further security features.

  4. Look for and click on the Encrypt option, generally the first choice in the menu.

  5. Select Encrypt with Certificate from the subsequent options. This method is ideal if you’re already aware of the recipients of the PDF and possess their email addresses. Should you encounter any issues when sharing your PDF through certificate encryption, consider switching to password encryption instead. It’s crucial to include your name in the recipient list to ensure your access to the PDF. If opting for certificate encryption, you are able to define the access permissions for each recipient by selecting their name from the list and clicking on Permissions.

  6. Save your modifications to the PDF document. For Windows, this can be done by pressing Ctrl + S, and for Mac users, ⌘ Cmd + S.

This method of securing PDF files, whether through password protection or certificate encryption, is a vital step for anyone looking to lock PDFs against unwanted modifications.


In conclusion, mastering how to lock a PDF from editing is a vital skill in today’s digital age, where the security of sensitive and confidential information is paramount.

Whether using Adobe Acrobat Pro DC, or the built-in features of MacOS, securing your PDF files through password protection and restriction settings ensures that unauthorized users are prevented from altering or accessing your documents.

By adopting these methods, you can protect PDFs efficiently, maintain the integrity of your sensitive data, and ensure that your documents remain in read-only mode for the intended audience.

Remember, employing a strong password and setting appropriate permissions are key steps in fortifying the security of your PDF documents.

Raman is a digital marketing expert with over 8 years of experience. He has a deep understanding of various digital marketing strategies, including affiliate marketing. His expertise lies in technical SEO, where he leverages his skills to optimize websites for search engines and drive organic traffic. Raman is passionate about staying up-to-date with the latest industry trends and sharing his knowledge to help businesses succeed in the online world.