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Open-Source Projects
Discover top open-source software, updated regularly with real-world adoption signals.
Discover top open-source software, updated regularly with real-world adoption signals.
Blazing-fast full-text search for browsers and Node.js
FlexSearch delivers ultra-fast, feature-rich full-text search in JavaScript, supporting multi-field queries, phonetic matching, tagging, highlighting, persistent indexes, and parallel workers across browsers and Node.js.
FlexSearch is a JavaScript full-text search engine designed for both browser and Node.js environments. It targets developers who need instant, high-performance search without relying on external services. The library offers multi-field document search, phonetic transformations, partial matching, tag-based queries, result highlighting, and suggestion generation, all within a single, lightweight package.
Version 0.8 introduces persistent indexes that can be stored in a variety of back-ends—including IndexedDB, Redis, SQLite, PostgreSQL, MongoDB, and ClickHouse—allowing large data sets to be queried efficiently. Parallel workers distribute indexing and query workloads across threads or Web Workers, delivering benchmarked speeds up to a million times faster than many alternatives. The engine supports a broad set of character sets (Latin, CJK, Hindi, Arabic, Cyrillic, Greek, Hebrew), making it suitable for multilingual applications.
FlexSearch can be imported as an ES module or used with CommonJS, and it works seamlessly with modern frameworks. Community adapters provide ready-made hooks for React (react-use-flexsearch), Vue (vue-use-flexsearch), Gatsby (gatsby-plugin-flexsearch), and static site generators like Nikola. Because the core library is pure JavaScript, it can be bundled with bundlers such as Webpack, Rollup, or Vite, and it respects tree-shaking to keep bundle size minimal. The project is maintained by Antithesis Operations LLC and was nominated by GitNation for Best Technology of the Year.
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No, it runs entirely in JavaScript and can operate in the browser or Node.js; backend storage is optional for persistent indexes.
InMemory (default), IndexedDB, Redis, SQLite, PostgreSQL, MongoDB, and ClickHouse.
FlexSearch provides a worker API that offloads indexing and query work to Web Workers (browser) or child processes (Node.js).
Yes, the library ships with type definitions for seamless TypeScript integration.
Official plugins exist for React, Vue, Gatsby, and Nikola, linked from the repository README.
Project at a glance
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