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Word Difference Checker

See which words were added, removed or kept between two drafts.

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Words added

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Words removed

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Frequency changed

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Quick Tool Overview

The Word Difference Checker reports which words entered and left a document between two drafts, plus the words whose frequency changed substantially. It is the from-a-distance view of an edit — the shape of a rewrite is visible in the word lists in a way it is not in the paragraphs.

What it does
Lists the words added, removed and changed in frequency
You give it
Two drafts of the same document
You get back
Three word lists with counts
Best for
Editorial review and tracking terminology drift
Text Tools Free, unlimited use No sign-up Runs in your browser

About the Word Difference Checker

This answers a narrower question than a full diff: not where the text changed, but which words entered and left the vocabulary. That is the right question when you are looking at an edit from a distance — a rewrite that added ten technical terms and removed fifteen hedging words has a shape you can see in the word lists and not in the paragraphs.

Every word unique to the original is listed as removed, every word unique to the revision as added, and the shared vocabulary is counted alongside. Frequency changes are reported too, so a word that survived but went from two uses to twenty shows up as well. It is a useful view for editors, for tracking how a document's terminology drifts across versions, and for checking that a rewrite for keywords actually changed what it was meant to.

Key features of the Word Difference Checker

Added and removed vocabulary

The words unique to each draft, which shows the character of an edit rather than its position.

Frequency change list

A word that survived but went from two uses to twenty is a real editorial change, and it appears here.

Shared vocabulary counted

How much of the word choice survived the rewrite, expressed as a proportion.

Filler words optional

Exclude them to study content, keep them to study style — a jump in hedging words is itself a finding.

Honest about stemming

Inflected forms are counted separately rather than merged by a rule that would sometimes be wrong.

How to use the Word Difference Checker

  1. 1

    Paste the original draft

    The earlier version goes in the first box.

  2. 2

    Paste the revision

    The later version goes in the second box.

  3. 3

    Set the matching rules

    Ignore case and exclude filler words so the comparison is about meaningful vocabulary.

  4. 4

    Read the three lists

    Words added, words removed and words whose frequency changed significantly.

Frequently asked questions

Text Compare shows you where the text changed, in order, in context. This shows which words entered and left the vocabulary regardless of position, which is the view you want for judging the character of an edit rather than reviewing it line by line.

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