Levenshtein Distance Calculator Online
Calculate edit distance and string similarity between two texts. Free online tool — private, browser-based, no upload required.
Levenshtein distance counts the minimum number of single-character edits — insertions, deletions, or substitutions — needed to transform one string into another. It powers spell checkers, fuzzy search, deduplication, and plagiarism detection.
Example: kitten → sitting
The edit distance between "kitten" and "sitting" is 3: substitute k→s, substitute e→i, append g. A similarity percentage of ~57% reflects how close the two strings are relative to their length.
When to use edit distance
- Matching user input against a list despite typos
- Comparing product names or addresses for duplicates
- Evaluating OCR or transcription accuracy
- Building "did you mean?" search suggestions