Plagiarism & Writing
Text Similarity Checker
Compare two texts and calculate a real similarity score using Jaccard, cosine, and n-gram algorithms. Side-by-side comparison with highlighted matching phrases.
100% private — processed in your browser only
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How to use Text Similarity Checker
1
Enter Text A
Paste the first text into the left panel.
2
Enter Text B
Paste the second text into the right panel.
3
Click Compare Texts
The tool calculates similarity using Jaccard, cosine, and n-gram algorithms.
Your privacy is protected
This tool runs entirely in your browser. Files you upload are never sent to any server — they are processed locally using JavaScript and immediately discarded when you close the page.
Frequently Asked Questions
What algorithms are used?
A weighted combination of Jaccard similarity (25%), cosine TF similarity (35%), bigram Jaccard (25%), and trigram Jaccard (15%).
Is the comparison case-sensitive?
No. Text is normalized to lowercase before comparison.
What counts as a matching phrase?
A sequence of 4 or more consecutive words that appear identically in both texts.