Text Similarity Checker
Compare and check similarity between texts
The Text Similarity Checker analyzes two separate documents or text blocks to calculate the degree of overlap and similarity. Essential for checking for plagiarism, comparing drafts, and ensuring content uniqueness. Check text similarity now!
Text Similarity Checker Tool
Compare two texts using 5 advanced algorithms: Jaccard Index, Cosine Similarity, Edit Distance, Word Overlap, and Sentence Overlap. Press Ctrl+Enter to analyze.
Quick Examples
Overall Similarity
Text Statistics
Text 1
Characters:
Words:
Sentences:
Unique Words:
Common
Shared Words:
Common words:
Text 2
Characters:
Words:
Sentences:
Unique Words:
Algorithm Breakdown
Jaccard Index
Formula: |A ∩ B| / |A ∪ B|
Compares unique words shared vs total unique words
Compares unique words shared vs total unique words
Cosine Similarity
Formula: (A · B) / (||A|| × ||B||)
Measures angle between word frequency vectors
Measures angle between word frequency vectors
Edit Distance
Algorithm: Dynamic programming
Counts minimum character edits needed
Counts minimum character edits needed
Word Overlap
Formula: |A ∩ B| / min(|A|, |B|)
Shows what % of smaller text is in larger
Shows what % of smaller text is in larger
Sentence Overlap
Method: Jaccard per sentence
Matches similar sentences (>30% threshold)
Matches similar sentences (>30% threshold)
Understanding Similarity Scores
80-100% Very High: Texts are nearly identical or extremely similar
60-79% High: Strong similarity, likely related content or paraphrase
40-59% Medium: Some similarity, possibly same topic or theme
20-39% Low: Limited similarity, different contexts or subjects
0-19% Very Low: Minimal or no similarity between texts
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