sql.js

SQLite compiled to JavaScript via Emscripten, enabling full SQLite functionality in browsers and Node.js without native bindings. Current stable version is 1.14.1, released periodically. Key differentiator: runs entirely in memory using WebAssembly (or legacy JS), allows importing/exporting SQLite database files as Uint8Array, and works cross-platform without native dependencies. Includes contributed math/string extension functions. Note: unlike native SQLite bindings (e.g., sqlite3), sql.js requires loading the entire database into memory, which can cause out-of-memory issues for large databases. Pure JavaScript implementation with WebAssembly fallback.