Free tool

Compare two Word documents.
Download the redline.

Upload two .docx files. Get back a Word document with native tracked changes — ready to open, review, and share. No account required.

Files are processed in memory and discarded as soon as the redline is generated. Nothing is stored on our servers.

Original document
Modified document

Processed in memory. Not stored.

Structural diff

Every insertion and deletion is marked as a native Word tracked change. Accept or reject in Word exactly like a human-authored redline.

No persistence

Your files never touch a database or object store. They're held in memory for the duration of the request and then dropped.

Same engine

This uses the exact same diff engine that powers the full Clausul app — minus the AI layer.

Want the AI layer on top?

This tool gives you the raw redline. The full Clausul app ranks every change by materiality — so you see what matters first, filter formatting noise, and review 200-change redlines in minutes instead of hours.

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