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Compare Documents produces a clean redline between any two versions of a document and exports it as a Word file with native Track Changes - the same revision markers a partner would see if an associate marked it up by hand. The comparison works even when the original and revised versions are in different formats (PDF vs. Word, scanned vs. digital).
Side-by-side document comparison showing an original NDA and a revised NDA with redline tracked-changes markup and a panel summarizing the changes

Side-by-side redline of an original and revised NDA with tracked changes and a change summary panel

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When To Use It

  • Reviewing a counterparty’s markup of your draft
  • Comparing the executed version of a contract to the last clean draft
  • Checking what changed between two amendments
  • Diffing a regulatory filing against a prior submission
  • Showing a client exactly what counsel changed in a document they sent

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How It Works

1

Upload or pick the two versions

Drop the original and revised files in, or select existing documents from your matter.
2

Automatic alignment

The tool aligns the text, accounting for reordering, formatting differences, and OCR artifacts.
3

Change classification

Each change is classified as an insertion, deletion, formatting change, or move.
4

Review or export

Review the redline in the browser side-by-side, or export to Word with native Track Changes.

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Cross-Format Comparison

You do not need to convert files before comparing. The tool handles: Text from scanned documents and images is read automatically before the comparison runs.
Scanned and image-only inputs run through OCR before alignment. For pages with heavy handwriting, complex tables, or low scan quality, spot-check the redline against the source - the alignment is only as accurate as the OCR.

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Comparison Settings

Tunable for the kind of redline you want: Save your settings as a profile so the team uses the same comparison rules across a matter.

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Native Track Changes Export

The exported Word file uses real Track Changes revisions - not annotations, comments, or highlight tricks. When the recipient opens it:
  • Accept and Reject buttons work as expected
  • Each revision shows the original author attribution
  • Comments are preserved alongside insertions and deletions
  • Formatting changes appear in the review pane
The document is fully editable in Word, Google Docs, or any other Office-compatible editor.

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AI Change Summary

Above the redline, the tool generates a plain-English summary of what changed:
“The counterparty narrowed the indemnification scope to direct damages only, extended the cure period from 15 to 30 days, and added a new mutual non-solicit clause. The limitation of liability cap was raised from 12 months of fees to 24 months.”
Use the summary as the cover note when you forward the redline to a partner or client.

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Side-By-Side Viewer

In the browser, view both documents side-by-side with synchronized scrolling. Each change is highlighted in both panes, with a count of insertions, deletions, and moves at the top.

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Tips

Compare against the executed version. Keep the signed PDF in the matter and compare every amendment back to it - drift between drafts is one of the most common sources of dispute.
Use Ignore Numbering on counterparty markups. Avoids drowning in section-renumbering noise so you can see the substantive changes.
Combine with Redline Analysis. For the why behind a counterparty’s edits, run Redline Analysis on the same pair after generating the redline here.

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Summarize material changes

Material Change Summary - executive cover note that flags what actually shifted between two versions.

Contract Review

Clause-level review with playbook-based redlines.

Redline Analysis

Commentary on existing tracked changes.

Document Matrix

Compare structured fields across many documents at once.

Document Search

Ask questions across both versions during review.