Postgres.js is a PostgreSQL client library for Node.js, Deno, Bun, and CloudFlare Workers that emphasizes performance and developer experience through ES6 tagged template strings.
The library addresses the need for a fast, full-featured PostgreSQL driver by using tagged template literals as its core query interface. This approach automatically extracts and parameterizes query values before sending them to the database, preventing SQL injection while enabling dynamic query construction. Parameters are serialized according to inferred types and sent separately to the database, which handles escaping and casting. Queries return result arrays with objects mapping column names to row values and are executed only when awaited or when explicitly calling execute().
Developers should choose this tool if they need a lightweight PostgreSQL client with a simple API surface that prioritizes performance. The project suits applications built with Node.js, Deno, Bun, or CloudFlare Workers where query safety and speed matter. The README highlights that the library is the fastest full-featured PostgreSQL client available in its category, though it does not name specific alternatives for comparison. Beyond basic queries, the tool supports transactions, data transformation, listen and notify functionality, realtime subscriptions, custom types, connection pooling with reserved connections, and TypeScript support.
Development activity shows consistent maintenance with regular updates to the changelog. The project maintains active community engagement through Gitter chat and social media presence. The codebase demonstrates attention to both performance optimization and API usability, with documentation covering connection management, advanced query methods, error handling, and type support across multiple JavaScript runtimes.
