Autypo is a blazing-fast .NET library for fuzzy autocomplete, typo correction, and short-string search.
Designed for structured data and autocomplete-first experiences, it supports per-token configuration,
background indexing, and full ASP.NET Core integration out of the box.
Blazing-fast autocomplete and typo-tolerant search for .NET
Autypo is a powerful, developer-friendly search engine for autocomplete, fuzzy matching, and short-string lookups. Whether you're building a product search bar, form helper, or CLI — Autypo makes it effortless to deliver typo-tolerant, fast, and intelligent user experiences.
Autypo works out-of-the-box — no config required.
Just provide your data and start getting intelligent completions.
using Autypo;
using Autypo.Configuration;
string[] movies = [
"The Lord of the Rings: The Return of the King",
"Star Wars: Return of the Jedi",
"Batman Returns"
];
IAutypoComplete autypoComplete = await AutypoFactory.CreateCompleteAsync(config => config
.WithDataSource(movies));
IEnumerable<string> suggestions = autypoComplete.Complete("retur of the");
// → "Star Wars: Return of the Jedi", "The Lord of the Rings: The Return of the King"
suggestions = autypoComplete.Complete("bamman rets");
// → "Batman Returns"
No tokenization setup. No fuzzy matching config. Just smart results.
✅ ASP.NET Core Setup with Background Indexing
For real-world apps, Autypo integrates seamlessly with ASP.NET Core and supports background indexing, multi-field search, and dependency-injected data sources.
using Autypo;
using Autypo.AspNetCore;
using Autypo.Configuration;
builder.Services.AddScoped<ProductsLoader>();
builder.Services.AddAutypoSearch<Product>(config => config
.WithDataSource(serviceProvider => serviceProvider.GetRequiredService<ProductsLoader>())
.WithBackgroundLoading(UninitializedBehavior.ReturnEmpty)
.WithIndex(product => product.Name, index => index
.WithAdditionalKeys(product => [product.Description]) // Index name + description
.WithUnorderedTokenOrdering() // Order of words doesn't matter
.WithPartialTokenMatching() // Partial queries still match
// ... and many more configuration options!
));
Define a search endpoint using dependency-injected Autypo:
* Levenshtypo is the fuzzy string search library that powers
Autypo’s low-level approximate matching engine. It supports typo-tolerant single-token search using
optimized Tries and Levenshtein Automata.