Web Tools
String Similarity Calculator
Compare two strings using multiple similarity algorithms: Levenshtein distance, Dice coefficient, Jaro-Winkler, Hamming distance, and Longest Common Subsequence. Runs entirely in your browser — your data never leaves your machine.
string similarity levenshtein dice jaro-winkler hamming lcs
Published May 30, 2026
All interactive tools run entirely in your browser. Your data never leaves your device.
How It Works
Enter two strings and the tool computes similarity scores using five different algorithms simultaneously. Each algorithm measures similarity differently, giving you a comprehensive view of how similar the strings are.
Algorithms
- Levenshtein Distance: minimum edits (insert, delete, substitute) to transform one string into the other
- Dice Coefficient: bigram overlap between two strings, good for measuring word similarity
- Jaro-Winkler: character matching with prefix boosting, commonly used for name matching
- Hamming Distance: positions where characters differ (same-length strings only)
- Longest Common Subsequence: length of the longest subsequence common to both strings
Features
- 5 algorithms at once: comprehensive similarity analysis in one view
- Visual progress bars: color-coded similarity percentage for each algorithm
- Distance + similarity: shows both raw distance and normalized 0-100% score
- 5 examples: typo, anagram, prefix, similar, and identical string pairs
- Private: runs entirely in the browser — no data transmitted
Use Cases
- Fuzzy string matching evaluation
- Typo detection algorithm comparison
- Name matching and deduplication
- Spell checker development
- Data quality assessment