PGlite – in-browser WASM Postgres with pgvector and live sync

In plain words

PGlite is a TypeScript/JavaScript library that runs Postgres in the browser, Node.js, and Bun as a 3MB WebAssembly build with no additional dependencies required. It supports multiple Postgres extensions including pgvector and offers a reactive "live query" API for real-time data updates. The library executes CRUD queries in under 0.3 milliseconds and handles multi-row select queries within a single frame, making it suitable for developers building database-driven applications in JavaScript environments.

written from the facts on this page · September 2026

From the sources

Lightweight WASM Postgres

Run a full Postgres database locally in WASM with reactivity and live sync. Dynamic extension loading mechanism, including support for pgvector and PostGIS. Built in support for data loading, synchronisation and live query primitives. This is a full PGlite Postgres running in your browser. It even includes pgvectorfrom pglite.dev

In the maker’s words, at launch

Hey, Sam and the team from ElectricSQL here. PGlite is a WASM Postgres build packaged into a TypeScript/JavaScript client library, that enables you to run Postgres in the browser, Node.js and Bun, with no need to install any other dependencies. It's 3mb Gzipped, now has support for many Postgres extensions…

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