Imagine you sent a draft of a contract to a client, and they emailed back a slightly modified version, but they forgot to use the “Suggesting” tool to track their changes. Trying to read two long documents side-by-side to spot tiny differences is incredibly frustrating. Fortunately, Google Docs has a built-in feature that acts like a digital magnifying glass, automatically highlighting every single difference between two files.
How to Compare Two Documents
To use this feature, both documents must be saved in your Google Drive.
- Open the first document (your original draft) in Google Docs.
- Click on Tools in the top menu bar.
- Select Compare documents from the drop-down menu.
- A small dialog box will appear. Click on My Drive to open the file picker.
- Find and select the second document (the edited version) that you want to compare against your original, and click Open.
- In the “Attribute differences to” box, type the name of the person who made the changes (or just type “Edited Version”). This helps you keep track of who did what.
- Click the blue Compare button.
Depending on the length of the documents, Google may take a few seconds to process the text. Once it finishes, a notification will appear saying “Comparison is ready.” Click the Open button in that notification.
Understanding the Comparison Document
Google Docs does not overwrite your original files. Instead, it generates a brand new, third document titled “Comparison of [Doc 1] and [Doc 2]”.
In this new document, every single difference between the two files is displayed as a tracked change (just like “Suggesting” mode):
- Words that were added in the second document will appear in brightly colored text.
- Words that were deleted from the original document will appear with a strike-through line across them.
You can now go through the document line by line. On the right side of the screen, you will see a comment box for every change. You can click the Checkmark to accept the change and keep it in the final document, or the X to reject the change and revert to your original text.
Conclusion
The “Compare documents” tool is an absolute lifesaver for writers, editors, lawyers, and students. It eliminates the need for manual proofreading and ensures that no subtle edits—whether accidental or intentional—slip past your notice.