The three ways to lock a Word document

You can lock a Word document in three different ways, depending on what you want to prevent. Restrict Editing lets you allow comments only while blocking all changes to the text itself. Password protection requires anyone who opens the file to enter a password first. Mark as Final signals that the document is complete and discourages editing, though it does not actually prevent it — someone can still turn this flag off and make changes.

Which method you choose depends on whether you want to stop accidental edits, prevent unauthorized access entirely, or simply signal that a document should not be changed. Most people use Restrict Editing when sharing a draft they want feedback on, password protection when the document contains sensitive information, and Mark as Final when distributing a finished version to a team.

Key Takeaways

  • Restrict Editing lets readers add comments and tracked changes but prevents them from editing the actual text of the document.
  • Password protection requires a password to open the file, and you can set a separate password that must be entered to remove the protection.
  • Mark as Final makes Word display a notification that the document is final, but does not actually prevent editing — anyone can turn it off.
  • Restrict Editing and password protection work on both Windows and Mac versions of Word, though the menu locations differ slightly.

How to use Restrict Editing to allow comments only

Restrict Editing is the most common choice when you want to share a document for review. Open the document, then go to the Review tab at the top. Click Restrict Editing (on Mac, this appears under Review as well, but may be labeled Protect Document). A panel will open on the right side of the screen.

In the Restrict Editing panel, check the box next to Limit formatting to a selection of styles or Allow only this type of editing in the document. If you choose the second option, a dropdown menu will appear — select Comments. This setting means readers can highlight text and add comments, but cannot delete or change any words in the document itself. Click Yes, Start Enforcing Protection at the bottom of the panel. Word will ask you to set a password (optional, but recommended). Type a password twice and click OK.

When someone opens the restricted document, they will see a message at the top saying the document is protected for comments. They can still read everything and add feedback, but the text itself cannot be edited. To remove the restriction later, go back to Review > Restrict Editing and click Stop Protection. If you set a password, you will need to enter it.

How to password-protect a Word document

Password protection prevents the document from opening at all without the correct password. Go to File > Info. On the right side, you will see a button labeled Protect Document (on Mac, this is under File > Properties). Click it and select Encrypt with Password.

A dialog box will appear asking you to enter a password. Type it in, then click OK. Word will ask you to type the password again to confirm it. Click OK once more. The next time someone tries to open this file, they will see a password prompt before the document appears. Without the correct password, they cannot view the document at all.

You can also set a separate password that allows someone to open the document but requires a different password to remove the protection and make edits. To do this, go to File > Save As. In the Save dialog, click Tools (or the gear icon on Mac) and select General Options. You will see two password fields: one to open the document, and one to modify it. You can leave either blank, or fill in both. This approach is useful when you want people to read a document but not change it.

How to mark a document as final

Mark as Final is the lightest form of protection. It tells readers the document is finished and should not be edited, but does not actually prevent editing. Go to File > Info. Click Protect Document and select Mark as Final. Word will show a message confirming the action.

When someone opens a document marked as final, they will see a yellow bar at the top saying "This document has been marked as final to discourage editing." The ribbon will be grayed out, making it harder to accidentally click editing tools. However, anyone can click Edit Anyway on that yellow bar and start editing immediately. This method is best for distributing finished versions to teams where you trust people to respect the "do not edit" signal, or when you simply want to prevent accidental changes.

Differences between Windows and Mac Word

The core features work the same way on both platforms, but the menu paths differ slightly. On Windows, Restrict Editing is under Review > Restrict Editing. On Mac, it is under Review > Protect Document. Password protection on Windows is File > Info > Protect Document, while on Mac it is File > Properties > Security.

The Save As dialog also differs: on Windows, click Tools in the Save dialog to find General Options. On Mac, click the gear icon in the Save dialog. Both versions support all three locking methods, so the choice of which to use does not depend on your operating system.

When to use each locking method

Use Restrict Editing when you are sharing a draft with colleagues or clients who need to review it and provide feedback. This method keeps the document text stable while allowing comments and tracked changes. Use password protection when the document contains confidential information, financial data, or anything you do not want unauthorized people to see. Use Mark as Final when you are distributing a finished document to a team and want to signal that it should not be changed, but you do not need technical enforcement.

You can also combine methods. For example, you might password-protect a document so only certain people can open it, then use Restrict Editing so those people can comment but not edit the text. This layered approach is common when handling sensitive documents that still need review and feedback.

Frequently Asked Questions

What happens if I forget the password I set?

If you forget a password you set on a Word document, you cannot recover it. Microsoft does not have a master password or recovery process for document-level passwords. You will need to recreate the document or contact whoever originally set the password. This is why it is important to store passwords in a secure location if you plan to lock documents long-term.

Can someone remove the protection if they have the file?

If you used Restrict Editing or Mark as Final without a password, yes — anyone can remove the protection by going to Review and clicking Stop Protection or turning off Mark as Final. If you set a password on Restrict Editing, they will need that password. Password protection on the file itself cannot be removed without the correct password.

Does locking a Word document work in Google Docs or other programs?

No. Restrict Editing and Mark as Final are Word-specific features. If someone opens a locked Word document in Google Docs or another program, those protections may not apply. Password protection on the file itself will still prevent opening, but the editing restrictions may not transfer. If you need protection that works across programs, password protection is your most reliable option.

Can I lock only certain parts of a document?

Yes, but it requires more setup. In Restrict Editing, you can check the box for "Limit formatting to a selection of styles" and then choose which styles are allowed. You can also manually select specific sections and protect only those sections while leaving others editable. This is useful for forms where you want people to fill in certain fields but not change the template itself.

What is the difference between Restrict Editing and password protection?

Restrict Editing controls what people can do inside the document — it lets you allow comments while blocking text changes. Password protection controls who can open the file in the first place. Restrict Editing is for managing how people interact with content they can already see. Password protection is for keeping the document hidden from unauthorized users entirely.