Calculate the Levenshtein edit distance and similarity between two strings online, in your browser.
Measure how different two strings are with the Levenshtein edit distance — the number of single-character insertions, deletions or substitutions to turn one into the other — plus a 0–1 similarity score.
Fuzzy matching, spell-check suggestions, deduplication and "did you mean" features all rank candidates by edit distance.
1 minus distance divided by the length of the longer string, so identical strings score 1 and totally different ones approach 0.