How to Compare Two Google Docs and Track Every Change
See how the Tools > Compare documents feature turns the differences between two Google Docs into suggested edits, and when Version history works better.
To compare two Google Docs, open either file, click Tools > Compare documents, choose the second document from your Drive, and click Compare. Docs builds a separate new file that marks every difference as a suggested edit, so you can accept or reject each one. This is a web feature, so use Docs in a browser — the phone apps don’t offer it.
Run the comparison from the Tools menu
Open the document you’ll treat as your baseline. On the menu bar, click Tools, then Compare documents. A dialog asks you to pick the comparison document and fill in an author label. Choose the second file from the Drive picker, set the label, and click Compare. Docs then shows an Open button to the new comparison document.
| Step | What you do | Where |
|---|---|---|
| 1 | Open the baseline document | Docs on the web |
| 2 | Click Tools, then Compare documents | Menu bar |
| 3 | Choose the second file | Drive picker |
| 4 | Type a name under “Attribute differences to” | Compare dialog |
| 5 | Click Compare, then Open | New comparison file |
Set the author label so results read clearly
The “Attribute differences to” field decides whose name sits on every change. Whatever you type becomes the author of the suggested edits, so the results stay easy to read. Use something plain like Draft vs final or a reviewer’s name. The label is only a tag — it doesn’t change anyone’s real access, but you do need edit access to the document you start from.
Review, accept, or reject each difference
The comparison document opens with the changes shown as suggestions. Hover over one and use the check mark to accept it or the X to reject it, just like normal Suggesting mode. Because the results sit in a new file, your two originals stay untouched. While you build a clean final copy, it’s a good moment to fix structure too — add a table or turn a rough list into a real checklist.
When Version history is the better choice
Compare documents is meant for two separate files. If your “two documents” are really one file at different points in time, use File > Version history > See version history instead (shortcut Ctrl+Alt+Shift+H). That panel lists saved versions with timestamps and editors and lets you restore an earlier one — the cleaner path for one shared doc.
Use Compare documents for two separate files and Version history for one file’s past. Either way, your originals stay intact, so you keep only what you want.