Fuzzy String Match & Similarity Checker Online

Compare strings (Levenshtein, Jaro-Winkler, token set, trigram), find the best matches in a list and cluster duplicates, with Vietnamese accent folding.

Result

Press “Run” to see the result.

Three modes. compare (a, b) returns every score between 0 and 1: normalised Levenshtein, Jaro-Winkler, token sort and token set ratio (as rapidfuzz), trigram similarity (as PostgreSQL pg_trgm) and combined, their mean, plus the edit distance. search (query, choices up to 10,000) returns the best matches above threshold with their index. dedupe (items up to 5,000) groups near-duplicates into clusters with a representative and returns the deduplicated list; pairs are blocked by shared trigrams, so large lists stay fast.

Before comparing, strings are normalised: case and Vietnamese accents are folded (Nguyễn = nguyen, đ = d), punctuation becomes spaces and common Vietnamese abbreviations are expanded (TP. = thành phố, Q. = quận, P. = phường, Cty = công ty, CP = cổ phần, TM = thương mại, HCM = Hồ Chí Minh…). Turn these off with keep_accents, case_sensitive and abbreviations=false, and drop noise words with ignore (for example "tnhh, cong ty").

Choose the score with algorithm: token_set for names whose word order or extra words vary (company names, product titles), jaro_winkler for short strings and typos at the end, levenshtein for codes, trigram for long texts. Nothing is stored.

Use this in your code

curl -X POST "https://apibox.io.vn/v1/fuzzy-match" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"a":"Cty TNHH Thương mại ABC, Q.1, TP.HCM","b":"Công ty TNHH TM ABC Quận 1 Hồ Chí Minh"}'

const res = await fetch('https://apibox.io.vn/v1/fuzzy-match', {
  method: 'POST',
  headers: {
    Authorization: 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "a": "Cty TNHH Thương mại ABC, Q.1, TP.HCM",
    "b": "Công ty TNHH TM ABC Quận 1 Hồ Chí Minh"
  }),
});
const data = await res.json();
console.log(data);

import requests

res = requests.post(
    "https://apibox.io.vn/v1/fuzzy-match",
    headers={"Authorization": "Bearer YOUR_API_KEY"},
    json={"a": "Cty TNHH Thương mại ABC, Q.1, TP.HCM", "b": "Công ty TNHH TM ABC Quận 1 Hồ Chí Minh"},
    timeout=30,
)
print(res.json())

<?php
$ch = curl_init('https://apibox.io.vn/v1/fuzzy-match');
curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_CUSTOMREQUEST => 'POST',
    CURLOPT_HTTPHEADER => ['Authorization: Bearer YOUR_API_KEY', 'Content-Type: application/json'],
    CURLOPT_POSTFIELDS => '{"a":"Cty TNHH Thương mại ABC, Q.1, TP.HCM","b":"Công ty TNHH TM ABC Quận 1 Hồ Chí Minh"}',
]);
$response = curl_exec($ch);
print_r(json_decode($response, true));

API documentation → Get a free API key

FAQ

Which score should I use?

combined is a good default. token_set ignores word order and extra words, jaro_winkler favours common prefixes, levenshtein counts edits, trigram suits longer texts.

Are Vietnamese accents ignored?

Yes by default, together with case and punctuation; set keep_accents=true when "Hà" and "Ha" must differ.

How large can the lists be?

search accepts 10,000 choices, dedupe 5,000 items of up to 1,000 characters each.