# wolfgarbe/SymSpell

SymSpell: 1 million times faster spelling correction & fuzzy search through Symmetric Delete spelling correction algorithm

Repository: https://github.com/wolfgarbe/SymSpell
Canonical: https://ross.abutalabs.com/products/symspell
Homepage: https://seekstorm.com/blog/1000x-spelling-correction/
Language: C#
License: MIT
License Family: permissive
Topics: levenshtein, fuzzy-search, approximate-string-matching, edit-distance, spellcheck, spell-check, levenshtein-distance, damerau-levenshtein, spelling, fuzzy-matching, word-segmentation, chinese-text-segmentation, chinese-word-segmentation, text-segmentation, spelling-correction, symspell
Last push: 2026-07-04T07:27:10+00:00

## Health v2 (maintenance only)
Score: 63/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 90, release rhythm 8, longevity 100
- inputs: {"age_days": 4544, "days_push": 60, "days_rel": 606, "gap_med": null, "n_releases_24m": 1}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3460, forks 311 (observed 2026-08-28T04:08:05.620973+00:00)

## What it is
SymSpell is a C# library implementing the Symmetric Delete spelling correction algorithm for extremely fast spelling correction and fuzzy string search. It also supports compound-aware correction and word segmentation, and is language independent.

## Use cases
- correct spelling errors in user search queries
- fuzzy match strings against a dictionary at high speed
- segment concatenated text into words
- build autocorrect for a text editor
- check spelling of Chinese or other language text
- find closest dictionary match for OCR output

## When to choose
- you need spelling correction orders of magnitude faster than Norvig-style approaches
- you need language-independent correction including CJK text
- you need compound-aware correction or word segmentation in .NET

## When to avoid
- you need a full-featured search engine rather than a spelling component
- your project cannot use .NET and no port is available
- you need context-aware (grammar-based) correction rather than edit-distance lookup

## Facets
- artifact type: library
- maturity: stable
- function: nlp, search-engine, parser
- domain: -
- platform: dotnet, cross-platform
- tags: spell-check, fuzzy-search, edit-distance, damerau-levenshtein, word-segmentation, string-matching, natural-language-processing, search, algorithms

## Member repositories
- wolfgarbe/SymSpell (main) score 63

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:05.620973+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 2026-08-29T18:36:56.566373+00:00, confidence not recorded.
  - readme: https://github.com/wolfgarbe/SymSpell (fetched 2026-08-28T04:08:05.620973+00:00, sha cab4c9d60f6c)
  - homepage: https://seekstorm.com/blog/1000x-spelling-correction/ (fetched 2026-08-29T09:30:59.871256+00:00, sha 97c66cc9e986)
- Data as of 2026-08-30T08:39:29.467469+00:00.