Text Comparison
Paste two texts to see their similarity, differences, and word-level diff.
Text A
Text B
Formula
Jaccard similarity = |A ∩ B| ÷ |A ∪ B| × 100% Word diff uses Longest Common Subsequence (LCS)
- |A ∩ B| (words) — Words present in both texts
- |A ∪ B| (words) — All unique words across both texts
Example: A: {cat, dog, fish}, B: {dog, fish, bird} → similarity = 2/4 = 50%
Interpreting Your Result
≥ 80%
Very similar
Texts share most vocabulary
50–79%
Moderately similar
Substantial overlap with notable differences
< 50%
Quite different
Distinct vocabulary or content
Frequently Asked Questions
What does the similarity score mean?
It's Jaccard similarity: the proportion of words shared between both texts relative to all unique words combined.
Is this a plagiarism checker?
It detects word overlap between two pasted texts. It's not a web crawler — it only compares what you paste.