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How to Password Protect a Word Document

by Olivia Baker

You can also read this article in German, Spanish, French, Italian and Portuguese.

Use the Smallpdf encryption tool to protect your Word Documents with unbreakable passwords.

Sometimes you want to password protect a sensitive Word document. It could be an important legal file, or just your embarrassing novel. Either way, we're here to help.

The most obvious approach to locking your Word documents with a password is within Word itself, which will be explained below. But we will also walk you through how to lock and protect your files with a range of our own tools, to make sure no one can get access to your information without your permission.

How to Lock Word Documents in Word

  1. Open your document in Word, and go to ‘Review’.

  2. Click on ‘Protect’, which will be on the right.

  3. In the dropdown, choose ‘Protect Document’.

  4. Set passwords for opening and/or modifying the document.

This is a perfectly acceptable way to protect your documents, however it is worth noting that the passwords have a limit of 15 characters. Sure, that sounds like more than enough, but it’s nice to have the option of a longer, more secure password should you want one. One of the best strategies for creating a memorable and easy to type password is to use a phrase. For example, “the1stwomansaidEureka!” is a pretty solid password. But to use that technique, you need to be able to input a longer password in the first place. And you can do exactly that when you protect your documents with Smallpdf. We also have more to offer you than long password options. By converting your Word documents to PDF format before protecting them with our 128-bit AES encryption your files will be safer than ever, and there’s the added bonus of being able to make them read-only. Additionally, you can use all of our other tools to merge multiple documents together, compress large files for sharing, or electronically sign forms, plus loads more possibilities.

How to Lock Word Documents With Smallpdf?

  1. Firstly,  convert  your Word Document to PDF.
  2. After downloading your now-PDF document, drop it into the  Protect tool.
  3. Input a password, and then confirm your choice.
  4. Once it’s loaded you can download your locked file!

Convert and Protect your documents in a flash.

Password Management Tools


Whether you want a lengthy, 20 character long password, or just a short and simple one to protect your Word document, they’re not always easy to remember. This is especially true if you have multiple different passwords (as you should) to make sure everything else is safe, should one account or document be hacked. But you also want to avoid writing passwords down anywhere that people could potentially find, so what do you do? Password management tools like Dashlane and Lastpass are a great way to store your passwords securely. You’ll just need to remember one password to access them all - one password isn’t too difficult to remember, right?

One important thing to note here: make sure to save your Smallpdf PDF protection passwords, because we unfortunately won’t be able to help you if you forget or lose it. The only person that knows your password is you!

Unlocking Your Documents


There is, of course, always a way to undo your password protection. If you protected your file with Word, simply follow the same steps you did to lock the document, erase the password from the field, and hit Save.

For those of you who protected your files with Smallpdf, upload it to our Unlock PDF tool. You’ll have to confirm that you’re the rightful owner by putting in the password, and pinky-promising that it’s yours to unlock—we take pinky promises very seriously, okay!

After you have proven that the file is yours you’ll be able to download it and it will be as if it were never locked in the first place.

Olivia Baker
Olivia Baker
Content Writer