Text Similarity Checker

Compare two texts with multiple similarity methods and review word overlap, sentence similarity, character similarity and common phrases.

Browser-based analysis. Your text is compared locally on this page.

Text A

Paste the first document, draft or reference text.

0 words0 characters

Text B

Paste the second document, revision or comparison text.

0 words0 characters

Similarity Results

Comparison complete.

Similarity
Waiting for comparison

Text A Words

Text B Words

Shared Unique Words

Common Phrases

Overall Similarity

0%0% similar100%

Similarity Methods

Method	Result
Jaccard Similarity	0%
Cosine Similarity	0%
Dice Similarity	0%
Sentence Similarity	0%
Character Similarity	0%

Shared Vocabulary

Common 3-Word Phrases

Important: This is a text similarity analysis tool. It does not search websites, academic databases or commercial plagiarism databases. A similarity percentage is not proof of plagiarism.

What Is a Text Similarity Checker?

A Text Similarity Checker compares two pieces of text and estimates how closely they match according to several measurable features. It is useful for comparing drafts, revisions, summaries, duplicate passages and related documents.

How Does This Text Similarity Checker Work?

The tool normalizes words, compares unique vocabulary and word frequencies, evaluates sentence-level overlap, measures character similarity and identifies repeated three-word phrases. The calculations are performed in your browser.

Why Are There Several Similarity Scores?

Different mathematical measures describe different aspects of text overlap. Jaccard focuses on shared unique words, cosine uses word frequency, Dice emphasizes overlap between sets, while sentence and character measures examine other structural similarities.

Does a High Similarity Score Mean Plagiarism?

No. Similarity is an analytical signal, not a plagiarism verdict. Shared wording can occur because of quotations, common terminology, templates, source material or legitimate reuse.

Frequently Asked Questions

Is my text uploaded to a server?

No. The comparison is performed locally in the browser on this page.

Can this tool search the internet for copied text?

No. It compares only the two texts that you provide.

Can I use it for articles and assignments?

Yes. It can help you compare drafts, revisions, articles, assignments and other text you control.

Which score should I focus on?

Use the overall score together with the individual method scores. Different texts can produce different patterns across the methods.