Compare two documents to find differences

When working with documents with co-authors, it is often necessary to compare two versions of the document. For example, if you forgot to block the ability to make changes to a document without tracking changes, after receiving an edited, agreed, or reviewed version of the document, you need to make sure that the resulting version of the document is identical to the original.

Word offers a useful function to compare two versions of the document and display only changed fragments. The Compare function does not change the original documents; by default, it creates a new document.

To compare two documents and display the changes, do the following:

1. Open the documents that you want to compare.

2. On the Review tab, in the Compare group, click the Compare button:

3. From the Compare drop-down list, select Compare. Compare two versions of a document (legal blackline):

Compare two versions of a document in Word 365

4. In the Compare Documents dialog box:

Compare Documents dialog box in Word 365

Full Compare Documents dialog box in Word 365

Important: Any options you select under More will be the default options for comparison the next time you compare documents.

Note: If either version of the document has tracked changes, Microsoft Word displays a message box:

Microsoft Word message box in Word 365

Click Yes to accept the changes and compare the documents.

Word displays a new third document (unless otherwise specified) in which tracked changes in the original document are accepted, and changes in the revised document are shown as tracked changes. For example:

Compare results in Word 365

Notes:

Compare revisions from multiple authors in Word 365

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Compare two documents to find differences

Compare two documents to find differences

When working with documents with co-authors, it is often necessary to compare two versions of the document. For example, if you forgot to block the ability to make changes to a document without tracking changes, after receiving an edited, agreed, or reviewed version of the document, you need to make sure that the resulting version of the document is identical to the original.