Developer Tools
Text Similarity Checker
Compare two texts for lexical similarity using cosine similarity. Fast, in-browser, no API key.
Uses term-frequency cosine similarity, not neural embeddings. Shared vocabulary creates a high score; semantic matches need an embedding model.
Text Similarity Explained: Cosine Similarity, Lexical Matching, and Embeddings
Learn how term-frequency cosine similarity works, when to use lexical vs semantic similarity, and how to compare documents without an API.