Quick Answer
This similarity checker compares two texts and returns an instant similarity score based on shared words and three-word phrases, along with a list of sentences that appear (nearly) verbatim in both. It is a first-line check for writers verifying originality, editors comparing versions, and students confirming their work is their own.
Key Takeaways
- Instant similarity score based on shared word and phrase n-grams.
- Matching-sentence list shows the specific overlaps.
- Live results as you type in either box.
- Honest scope: a helpful first check, not a full plagiarism database.
What This Tool Measures
The checker compares vocabulary and phrasing. It looks at the words shared between the two texts and — more tellingly — at shared three-word sequences, which are strong evidence of copied phrasing. The result is a percentage score plus a list of sentences that appear in both texts, so you are not left staring at a number you cannot explain.
How to Use the Checker
- Paste Text A into the first box.
- Paste Text B into the second box.
- Read the similarity score and scan the matched sentences.
- Interpret: a high score means substantial overlap; a low score means the texts are largely distinct.
Interpreting the Score
Scores below roughly 30% generally mean the texts share only common vocabulary — the overlap you would expect between any two pieces on the same topic. Scores above 60% indicate real structural overlap that deserves a close look. Between those extremes, rely on the matched-sentence list: it shows you exactly which phrases triggered the score.
What It Does Not Do
This tool compares the two texts you paste — it does not search the web or a plagiarism database. It cannot detect similarity to sources you have not provided. Think of it as a precise magnifying glass for the pair of documents in front of you, not a global originality scanner. For that, pair it with dedicated plagiarism services.
Conclusion
Knowing how similar two texts are should take seconds, not a close reading of both. Paste them above and let the numbers and matched sentences do the work. For a structural diff of every line, the text comparison tool shows the full picture.