Hands on · Word
Compare two Word documents. Get a redline that proves itself.
Drop the older version on the left, the newer on the right, click Compare. The result is a real redline — not a screenshot, not a proprietary viewer — and it verifies itself on every run: accepting all changes rebuilds the new document, rejecting all restores the old one.
Two ways to see the changes
Pick the output your reader needs.
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.docx · tracked changes
Real Word revisions
Native tracked changes the recipient reviews with Word's own accept/reject tools and Review-pane navigation. How the marks are displayed follows each viewer's Word settings.
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.docx · baked colors
Fixed strikeout/underline
The same changes flattened into fixed colors — insertions underlined, deletions struck through, in the two colors you pick. Looks identical in every viewer; ideal for e-mail, printing and PDF conversion. The report page carries a color key.
The details generic tools miss
Compared properly, not approximately.
- ✔Headers and footers redlined. Changes in running headers and footers — where form numbers and edition dates live — are tracked, not silently skipped.
- ✔Moved text recognized. Identical content deleted in one place and inserted in another reads as "moved (content identical)" on the report — not a false delete plus insert.
- ✔Formatting: your choice. Formatting-only changes are tracked as "Formatted:" marks when you want them — or adopted silently when a document was merely re-styled.
- ✔Every change numbered and clickable. The optional report page lists all changes — none truncated — each line a click-to-jump link to the change itself.
- ✔Changed paragraphs only, on demand. An excerpt of just the changed paragraphs with context, every omission explicitly marked — the full redline remains the deliverable.
- ✔Honest about limits. Anything that couldn't be redlined faithfully appears as a warning — on screen and on the report page. A warning never blocks the output.
Try it
Your first comparison, in four steps.
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Steps
- Drop the older file on the left tile, the newer on the right.
- Pick an output — sensible defaults are pre-selected.
- Click Compare. The result downloads automatically, with a ✔ Verified badge when the round-trip check passed.
- Open it: the first page is the report — every change listed and clickable, plus the certificate.
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Formats & proof
Formats:
.docxand.docm; both files of a pair must be the same kind.Proof: every output carries a SHA-256 certificate of its exact inputs and a tamper-evident manifest — drop it on the Verify page anytime and it proves it is unaltered. How verification works →
Already have a tracked-changes document? The Bake page flattens existing revisions into fixed colors, preserving author attribution on its report. Verify & Bake →
Where this goes deep
Built for documents where changes are scrutinized.
The same compare drives insurance form filings, EMA product information, legislative amendments and more. Spreadsheets? Compare two Excel files →