Document Editing Problems

How to Compare Two Word Contracts for Legal Redlining

Khadija KhanKhadija Khan Oct 19, 2026 869 views

Question details

The user needs to compare an original and a revised Word contract to identify and mark the differences, commonly known as legal redlining or blacklining.

How to Compare Two Word Contracts for Legal Redlining
Product
Microsoft Word
Device & OS
not provided
Scenario
Reviewing text additions, deletions, and modifications between two versions of a legal contract.
Observed behavior
The user wants to generate a combined document that clearly highlights all tracked changes between the original and the revised files.
Before you start

Ensure you have both the original and the revised versions of the contract saved locally on your computer where they can be easily accessed.

Solution 1Recommended

Use the Built-in Compare Feature in Microsoft Word

This is the standard and most effective method to perform a legal blackline or redline comparison between two Word documents.

Microsoft Word includes a dedicated tool that creates a 'legal blackline', combining two documents and showing the differences as tracked changes.

1
Access the Review Tab

Open Microsoft Word, create a new blank document, and navigate to the 'Review' tab located on the top ribbon.

2
Open the Compare Tool

Click on 'Compare' in the Compare group, then select 'Compare...' from the drop-down menu to open the Compare Documents dialog box.

3
Select the Original Document

Under the 'Original document' section, click the folder icon to browse your computer and select the older, original version of your contract.

4
Select the Revised Document

Under the 'Revised document' section, click the corresponding folder icon to find and select the updated version of your contract.

5
Customize Comparison Settings

Click 'More' to expand your options. Here, you can choose exactly what types of changes to flag (e.g., formatting, case changes, white space). Once configured, click 'OK' to generate your redlined document.

Use the Built-in Compare Feature in Microsoft Word
Comparison Complete: Word will create a brand new third document displaying all differences as standard tracked changes, leaving your original and revised files completely untouched.
Efficient Document Comparison

Compare Contracts Easily with WPS Writer

WPS Office offers a powerful Document Compare feature that works seamlessly with Microsoft Word documents, allowing you to instantly identify differences between two contract versions with a clear redline view.

  1. 1. Open WPS Writer: Launch WPS Office, open a document, and navigate to the 'Review' tab on the top menu bar.
  2. 2. Launch the Compare Tool: Click on the 'Compare' button in the ribbon to open the comparison dialog interface.
  3. 3. Select Your Contracts: Browse and select your original contract in the first field, and your revised contract in the second field.
  4. 4. Generate the Redline: Click 'OK' to instantly generate a clear, redlined document that highlights all text insertions, deletions, and formatting modifications.
Fully compatible with Microsoft Word (.docx and .doc) formats.Intuitive side-by-side or combined document comparison views.Lightweight software that processes large legal documents instantly.Completely free core editing features for daily document work.
microsoft office alternative - wps office

Frequently Asked Questions

What is the difference between a legal blackline and redlining in Word?

In Microsoft Word, 'legal blackline' is the built-in terminology for what legal professionals commonly refer to as 'redlining'. Both terms refer to the exact same process of comparing two versions of a document and marking the differences using tracked changes.

Can I save the compared document as a new file?

Yes. When Word generates the comparison, it creates a new, third document by default. You can easily save this by going to File > Save As, which allows you to keep the redlined document without overwriting your original or revised source files.

Why are minor formatting changes cluttering my compared document?

By default, Word compares formatting changes as well as text modifications. When setting up the comparison, click 'More' in the Compare Documents dialog box and uncheck 'Formatting'. This forces the tool to ignore font, margin, or layout changes and focus purely on the text content differences.