To compare two Word documents reliably, use Review > Compare > Compare Documents in a supported desktop edition of Microsoft Word. Select the original and revised files, create a new comparison document, and review the resulting tracked revisions before accepting anything.
Google Docs offers a similar comparison workflow through Tools > Compare documents. It creates a third document containing suggested edits. The right method depends on whether you need an automated revision comparison, consolidated reviewer changes, or a manual visual check.
A comparison identifies differences. It does not determine whether a change is correct, intentional, complete, or safe to approve.
How do you compare two Word documents?
In desktop Word, open either document and select Review > Compare > Compare Documents. Choose the Original and Revised files, review the available comparison settings, and create the result. Word creates a new comparison document by default and presents differences as tracked revisions or revision marks. Their appearance depends on the selected markup and comparison settings.
For example, you might compare agreement_v12.docx as the Original with agreement_v13.docx as the Revised file. Keeping both source files separate makes it easier to verify the inputs and preserve the review record.
Microsoft’s current feature matrix lists Compare and Merge revisions for Word desktop, not Word for the web. The exact ribbon labels and available options can vary by edition and platform. See Microsoft’s Word desktop and web feature comparison for the product boundary.
Compare finds differences. Combine consolidates tracked revisions. Side-by-side viewing supports manual inspection.
Compare, combine, or view side by side: which Word command should you use?
| Task | Word command | Result |
|---|---|---|
| Find differences between two versions | Compare | A new document with revision marks |
| Consolidate reviewers’ tracked edits | Combine | A new document containing consolidated revisions |
| Inspect two documents visually | View Side by Side | Two documents displayed for manual review |
Use Compare when the files are different versions of the same document and you need to identify changes. Use Combine when separate reviewers have edited copies with tracked changes that must be brought together. It is not a command for concatenating unrelated documents.
Use View Side by Side when you need to inspect layout or manually scan two open files. It does not create tracked changes or a comparison document.
How to compare two documents in desktop Word
Before starting, confirm that the files are comparable versions of the same document. Identify which file is Original and which is Revised, and check whether either file contains unresolved tracked changes. Word may require existing changes to be accepted before it can compare the files.
- Open a document in a supported desktop edition of Word.
- Select Review > Compare > Compare or Compare Documents, depending on the edition.
- Select the Original and Revised files. Check the labels carefully because reversing them can make the output harder to interpret.
- Review the available options. Word can compare text, formatting, and comments, and can show changes at character or word level, depending on the edition and settings.
- Create the comparison and inspect the new document. Accept or reject revisions only after the reviewer has assessed them.
Microsoft’s Windows legal-blackline instructions describe the comparison options and new-document workflow. Microsoft also documents comparing and combining document versions, although exact instructions can differ by edition.
How to combine tracked changes or inspect documents side by side
Combine reviewer edits
When reviewers have edited separate copies using tracked changes, select Review > Compare > Combine Documents in a supported desktop edition of Word. Choose the relevant versions and review the new combined document. Check that reviewer attribution remains useful and that the resulting revision history is understandable.
Combining revisions does not approve them. The document owner or assigned reviewer still decides which changes to accept, reject, or clarify.
View two documents side by side
Open both documents, select View > View Side by Side, and optionally enable Synchronous Scrolling. Microsoft’s side-by-side viewing instructions describe this mode.
Side-by-side viewing is useful for a layout check or a short manual inspection. For a long document or small text changes, it is not a substitute for an automated comparison.
How to compare documents in Google Docs
Google Docs can compare two Google Docs or a Google Doc with a Microsoft Word .docx file stored in Google Drive. Open the primary document, select Tools > Compare documents, choose the other document, and optionally set an attribution label or include comments from the selected document. Select Compare, then open the generated result.
Google creates a third document containing differences as suggested edits. It does not populate either source document with the comparison result. Google also states that document column layout and table column width are not compared, so inspect tables and layout separately.
To review the output, open the comparison document and select Tools > Review suggested edits. Google provides controls to preview, accept, or reject suggestions individually or in bulk. See Google’s Compare documents help and suggested-edits guidance.
Google’s current official help documents comparison and suggestion review, but does not document a separate general-purpose Combine Documents command. Treat suggestion acceptance as a review step, not as a native equivalent of Word’s revision-combination workflow.
Which third-party document comparison tool fits the job?
Choose a third-party tool by file type, required features, processing location, and organizational approval. The product name alone does not tell you whether files are uploaded or processed locally.
| Tool | Suitable use | Key constraint |
|---|---|---|
| Draftable Online | Word, PDF, Excel, PowerPoint, and plain-text comparisons | Files are uploaded for cloud processing. Current materials list .ppt and .pptx support. |
| Draftable Desktop | Desktop comparison where local processing is required | Windows application. Office 2007 or later is required for Word, PowerPoint, and Excel comparisons. |
| QuickDiff | Comparing two plain-text blocks | Not a formatted Word-document comparator. It offers filters for whitespace, blank lines, and case. |
| Diffchecker | Plan-dependent OCR, spreadsheet, batch, folder, image, or desktop comparison | Features and pricing depend on the selected plan. Verify current terms before use. |
Draftable’s online service uploads files to its cloud infrastructure, while Draftable Desktop is described as processing comparisons locally. Review the online-service security information before submitting confidential material.
QuickDiff is for plain text, not Word formatting, tables, footnotes, or document metadata. Diffchecker documents different capabilities across plans, including OCR, spreadsheet, folder, batch, and desktop features. Its pricing page can change, so do not rely on an old quoted price.
Online and desktop products from the same vendor can have different processing models. Before uploading a sensitive file, verify the selected edition, retention terms, access controls, and organizational approval.
How to preserve a trustworthy comparison and review record
When the review needs to be traceable, retain the Original file, Revised file, comparison output, approval decision, and final clean copy as distinct artifacts. Record which input was treated as Original and Revised. Accepting all revisions or suggestions applies proposed edits, but does not validate facts, citations, links, formulas, confidentiality, layout, or reviewer intent.
A lightweight comparison record can support recurring work. The following is a proposed operational record, not a Microsoft, Google, or third-party vendor schema. One record represents one comparison run:
{
"comparison_run_id": "run-2026-001",
"original_file_id": "agreement-v12",
"revised_file_id": "agreement-v13",
"original_version_label": "v12",
"revised_version_label": "v13",
"tool_name": "Microsoft Word desktop",
"tool_edition": "Windows desktop",
"comparison_options_hash": "options-7f31",
"output_file_id": "agreement-redline-001",
"reviewer_id": "reviewer-42",
"review_status": "in_review"
}If multiple workers can process the same inputs, enforce uniqueness at the database layer for the intended run scope, such as (original_file_id, revised_file_id, tool_name, tool_edition, comparison_options_hash). Use a database-enforced unique index or transactional upsert. A lookup followed by a separate insert is not safe against concurrent duplicates.
If the same files are deliberately compared again with different options, the normalized options hash makes that a distinct run. Any change-level records should reference comparison_run_id and represent one change, not another comparison run.
Teams formalizing repeatable review handoffs can explore ConsultEvo’s designing repeatable operational workflows. This is an optional reference for process design, not a claim of native Word or Google Docs integration.
- The Original and Revised files, version labels, and file roles are recorded.
- A named reviewer has resolved or assigned every material difference.
- The comparison output and approval decision are retained.
- The approved final file is saved separately from the source files and redline.
Frequently asked questions
Can I compare two Word documents in Word for the web?
Microsoft’s current feature matrix lists Compare and Merge revisions for Word desktop, not Word for the web. Use a supported desktop edition for the native comparison workflow.
Does Word change the original files when I compare them?
Word creates a new comparison document by default. Keeping that output separate preserves the two source versions for later verification.
Can Google Docs compare a Word file?
Yes. Google documents comparison between a Google Doc and a .docx file stored in Drive. The result is a new Google Doc with suggested edits.
Does Google Docs compare table widths and page layout?
No. Google’s comparison help says document column layout and table column width are not compared. Check those features separately after reviewing the suggestions.
Does Draftable Online upload files?
Yes. Draftable describes its online service as uploading files for cloud processing. Draftable Desktop is the local-processing option. Check your organization’s policy and the selected product’s retention terms before submitting sensitive material.
Is QuickDiff suitable for Word formatting?
No. QuickDiff compares plain-text blocks. It is not intended for Word formatting, tables, footnotes, or document metadata.