AI-Powered Text Comparison

See Exactly What Changed Between Two Texts

Paste two texts and get similarity scores across six dimensions, a specific list of differences, and a plain-English verdict in seconds.

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AI Text Compare

Paste two texts separated by the divider and get a full comparison: similarity scores across 6 dimensions, what's the same, what changed, and a plain-English verdict.

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Results

AI Text Compare

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AI Text Compare

Paste your text on the left and click the button to see the results.

Overall similarity score
Scores across 6 dimensions: Content, Tone, Style, Vocabulary, Structure, Formality
What's the same — specific shared content
What's different — added, removed, reworded
Tone and vocabulary shift analysis
Plain-English verdict

Content analyst reviewing a six-dimension comparison chart on a laptop

Six-Dimension Similarity Scoring

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Six-Dimension Similarity Scoring

Two texts can share the same content while differing completely in tone. Or use the same vocabulary while organizing information in an entirely different structure. A single similarity score misses these nuances. This tool scores six dimensions independently — Content/Meaning, Tone, Style, Vocabulary, Structure, and Formality — so you can see exactly where the texts align and where they diverge, and identify which dimension drives the overall difference.

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Specific Differences, Not Vague Labels

See the Differences

Specific Differences, Not Vague Labels

The comparison identifies every meaningful difference between the two texts: what was added in Text 2, what was removed from Text 1, what was reworded, how the tone shifted, and how vocabulary changed. Every finding references the actual text — not vague labels. You can see which specific phrases were changed and whether the change was a stylistic choice, a meaning change, or a structural reorganization.

See the Differences

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Focus on What Matters

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Focus on What Matters

Choose a comparison focus to get deeper analysis in the area that matters most: Content & Meaning for checking whether two texts say the same thing, Style & Tone for comparing writing voice, Structure & Organization for checking how content is arranged, or Vocabulary & Wording for comparing the specific language used. All Dimensions gives full coverage across every area.

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How It Works

How to Compare Two Texts

Paste Both Texts

Paste Text 1 in the input, then add the divider "--- TEXT 2 ---" on its own line, then paste Text 2 below it. The tool clearly shows the expected format in the input area.

Choose a Focus (Optional)

Select a comparison focus — All Dimensions, Content & Meaning, Style & Tone, Structure & Organization, or Vocabulary & Wording — to get deeper analysis in the area that matters most.

Get the Full Comparison

Receive an overall similarity score, six-dimension scoring, a specific list of what is the same and different, tone and vocabulary shift analysis, and a plain-English verdict.

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Who Uses It

Writer at a desk comparing two draft versions of an article on a laptop

Use Case

Writers Comparing Draft Versions

Compare two drafts of an article, essay, or document to see exactly what changed between versions. Identify whether edits improved the tone, vocabulary, or structure — or accidentally changed the meaning.

Editor reviewing two versions of a manuscript side by side with annotations

Use Case

Editors and Proofreaders

Verify that a revised document accurately reflects the intended changes without introducing unintended modifications. Check that tone, formality, and vocabulary are consistent across edited versions.

Legal professional comparing two contract versions at a tidy desk

Use Case

Legal and Compliance Teams

Compare two versions of a contract, policy document, or regulatory filing to identify every change between versions — including subtle wording differences that could alter interpretation.

SEO analyst at a desk comparing two article versions on a laptop for content similarity

Use Case

Content Creators and SEO Teams

Compare original and paraphrased content, two versions of product copy, or two competitor articles to assess similarity and differentiation. Ensure paraphrased content is distinct enough to avoid duplication.

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Deep Dive

What Text Comparison Reveals

Comparing texts reveals more than just word-level differences. Understanding the dimensions of text comparison helps you use the tool effectively and interpret the results correctly.

Wide collage of document comparison scenarios — desks, printed documents, laptops, annotations

Content vs. Expression

The most important distinction in text comparison is between content (what is said) and expression (how it is said). Two texts can cover exactly the same content using completely different vocabulary, tone, and structure — or they can use very similar language while making completely different arguments. Scoring these separately reveals which type of change occurred. A high content score with a low style score means the message is the same but the voice is different. A low content score with a high vocabulary score means the same words are used to say different things.

High content, low styleSame message, different voice — a revision of tone and writing style without changing the argument

Low content, high vocabularyDifferent message using similar terminology — may indicate a related but distinct topic

High content, high styleNear-identical texts — essentially the same document with minor polish edits

Tone Shift and Its Significance

A tone shift between two versions of the same document is one of the most consequential differences to detect. Editors sometimes inadvertently shift a document from warm to cold, or from confident to uncertain, while making other edits. A formal policy document that becomes warmer in revision may feel less authoritative. A customer email that becomes more direct in revision may feel less empathetic. Detecting tone shift separately from content change ensures you can evaluate the revision on both dimensions independently.

Intentional tone shiftHumanizing a formal document, making customer copy friendlier, making a proposal more authoritative

Unintentional tone shiftAn edit intended to improve clarity accidentally makes the text feel cold, aggressive, or uncertain

Structure and Information Architecture

How content is organized — the order of arguments, the placement of the key conclusion, the distribution of information across paragraphs — is a dimension of text that is often changed in revision but rarely explicitly tracked. Moving the conclusion to the beginning, reorganizing supporting points, or splitting a long paragraph into two changes the reader's experience of the content even when every word is the same. Structure comparison identifies these organizational changes independently of content or wording changes.

Common structural changesMoving the conclusion first (executive brief style), grouping related points together, adding section breaks

Why structure mattersThe same information organized differently creates a different impression — leading with the recommendation vs. the evidence

Vocabulary and Formality Differences

Vocabulary and formality are distinct dimensions. Vocabulary change tracks which specific words were substituted — synonyms used, jargon added or removed, concrete vs. abstract language. Formality change tracks the overall register shift — whether the text became more or less formal regardless of specific word choices. A text can increase in formality by adding hedging language ("it may be the case that") without changing the core vocabulary. Or it can change vocabulary significantly (replacing technical jargon with plain English) while maintaining the same formality level.

Vocabulary shift without formality shiftPlain English rewrites that maintain a professional register — same level of formality, clearer words

Formality shift without vocabulary shiftAdding hedging, passive voice, or formal connectors while keeping the same core words

Note: AI text comparison is semantic, not character-level. It identifies meaningful differences in content, tone, and style — not byte-level diffs. For exact character-level comparison, use a traditional diff tool.

Benefits

Why Use It

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6-Dimension Scoring

Content, Tone, Style, Vocabulary, Structure, and Formality scored independently — so you can see exactly where the texts align and where they diverge.

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Specific Differences Listed

Every addition, removal, and reword is identified with specific references to the actual text — not just a similarity percentage.

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Comparison Focus

Focus the analysis on Content, Style, Structure, or Vocabulary for deeper coverage in the area that matters most for your use case.

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Plain-English Verdict

A clear verdict on whether the texts are essentially the same, substantially different, or completely different — with tone and vocabulary shift analysis.

Related Tools

Frequently Asked Questions

How do I paste two texts for comparison?

Paste Text 1 in the input area, then type "--- TEXT 2 ---" on its own line as a separator, then paste Text 2 below it. The placeholder in the input area shows the exact format expected. The AI parses both texts from the separator and compares them.

What does the overall similarity score mean?

The overall similarity score is a weighted average across all six dimensions. A score of 80% or above generally means the texts are essentially the same with minor variations. 50–80% indicates significant differences in at least some dimensions. Below 50% means the texts are substantially or completely different in their content, style, or both.

What are the six comparison dimensions?

Content/Meaning: how much of the core information and arguments overlap. Tone: how similar the overall emotional register and voice are. Style: writing style consistency — active vs. passive, sentence complexity, etc. Vocabulary: word choice and terminology similarity. Structure: how similarly the content is organized and sequenced. Formality: how closely the formality levels match.

Can I compare texts in different languages?

The comparison works best when both texts are in the same language. Comparing texts in different languages will primarily compare structure and length rather than content and vocabulary, which limits the usefulness of the analysis.

Is this the same as a file diff tool?

No. A file diff tool does character-level comparison — it finds exact character-for-character differences. This tool does semantic comparison — it identifies meaningful differences in content, tone, vocabulary, and structure, even when the wording is completely different. Two texts can be 0% similar character-by-character while being 90% similar semantically. For exact character comparison, use a traditional diff tool.

How long can each text be?

Up to 20,000 characters total across both texts — roughly 3,000–4,000 words combined. For best results, paste texts of a similar length. Very different lengths will naturally produce lower structural similarity scores.

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Sign up free and get 100 credits instantly. Paste two texts and get a full six-dimension comparison with specific differences and a plain-English verdict in seconds.

Disclaimer: This tool uses generative AI technology which may produce content that resembles copyrighted materials or that is inaccurate, incomplete, or out-of-date. It is provided for general information and educational purposes only and is not intended for illegal activities or to replace professional advice, diagnosis, or treatment. Users are solely responsible for how they use the generated content. If you plan to use AI-generated content commercially or publicly, we strongly recommend reviewing it for potential copyright issues and obtaining proper permissions where necessary. We accept no liability for copyright infringement or any other consequences resulting from the use of content generated by this tool.