If you don't pay or don't want to pay for a 3rd party doc comparison tool, you can use Word built-in document comparison tool. Here's how:
- In Word, click on the Review tab, go to the Compare group, click on the Compare button.
- Click on the first option "Compare two versions of a document (legal blackline)."
- Under Original document, browse for the document that you want to use as the original document.
- Under Revised document, browse for the document that you want to compare (normally the newer or revised document).
- Click More to select the settings for what you want to compare in the documents.
By the way - any options that you set now will stick at the default options for comparison the next time you compare documents. - Under Show changes, choose whether you want to show character or word level changes.
- Word will want to create a 3rd document for the results, but if you do not want to display changes in a third document, choose which document you want the changes to appear in.
- Click OK.
If either version of the document has tracked changes, Microsoft Word displays a message box. Click Yes to accept the changes and compare the documents. - Microsoft Office Word displays a new third document in which tracked changes in the original document are accepted, and changes in the revised document are shown as tracked changes. Your two source documents are not changed.
Not using Word 2010?
- For Word 2007, the steps are the same but here's a step-by-step guide anyway.
- Word 2003 - see this article
- Mac User? Check out this good article from Brett Burney on how-to plus some extra tips.

