# krisk/Fuse

Lightweight fuzzy-search, in JavaScript

Repository: https://github.com/krisk/Fuse
Canonical: https://ross.abutalabs.com/products/fuse
Homepage: https://fusejs.io/
Language: JavaScript
License: Apache-2.0
License Family: permissive
Topics: javascript, lightweight-fuzzy-search, weighted-search, bitap
Last push: 2026-08-09T04:40:41+00:00

## Health v2 (maintenance only)
Score: 96/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 96, release rhythm 93, longevity 100
- inputs: {"age_days": 5210, "days_push": 24, "days_rel": 51, "gap_med": 20.0, "n_releases_24m": 7}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 20458, forks 813 (observed 2026-08-28T04:11:30.141872+00:00)

## What it is
Fuse.js is a lightweight, zero-dependency fuzzy-search library written in TypeScript that runs in the browser, Node.js, and Deno. It uses the Bitap algorithm for typo-tolerant matching over small-to-medium JSON datasets, with weighted keys, extended/logical query operators, token search, and optional Web Worker parallelism.

## Use cases
- add typo-tolerant search to a client-side list of items
- fuzzy search a JSON array in the browser without a backend
- search small-to-medium datasets where no dedicated search server exists
- rank search results across weighted object fields
- run multi-word fuzzy queries with relevance ranking
- search large datasets without blocking the UI using web workers

## When to choose
- you need client-side fuzzy search with zero dependencies and tiny bundle size
- your dataset is small-to-medium and you cannot run a search backend
- you want typo tolerance, weighted fields, and logical query operators in one library
- you need the same search to work in browser, Node.js, and Deno

## When to avoid
- you need to index millions of documents or scale search across servers
- you need full-text search features like stemming, faceting, or highlighting
- you already run a dedicated search engine like Elasticsearch or Meilisearch

## Facets
- artifact type: library
- maturity: stable
- function: search-engine, nlp
- domain: web-development, frontend, developer-tools
- platform: browser, cross-platform
- tags: fuzzy-search, bitap, zero-dependency, client-side-search, typo-tolerance, weighted-search, web-workers, search, nodejs, deno, web-server

## Member repositories
- krisk/Fuse (main) score 96

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:30.141872+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T16:58:47.525613+00:00, confidence not recorded.
  - readme: https://github.com/krisk/Fuse (fetched 2026-08-28T04:11:30.141872+00:00, sha a82c2af144d0)
  - homepage: https://fusejs.io/ (fetched 2026-08-29T07:57:49.441552+00:00, sha 6b4084a48409)
  - site_page: https://www.fusejs.io/getting-started.html (fetched 2026-08-29T07:57:49.444112+00:00, sha 7de183f5e50d)
- Data as of 2026-08-30T08:39:29.467469+00:00.