Pglite

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PGlite is a Coding & Development tool that provides an embeddable Postgres database in WASM. It allows developers to run Postgres in browsers, Node.js, Bun, and Deno without external dependencies.

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At a glance

Pricing

Open Source

Free tier

Yes

API

Yes

Skill level

Technical

About

What is pglite?

PGlite is an innovative solution offering a WASM build of Postgres, packaged as a TypeScript client library. This enables developers to embed and run a full Postgres database directly within various environments, including web browsers, Node.js, Bun, and Deno, eliminating the need for external installations. It's designed for building reactive, real-time, and local-first applications. PGlite is remarkably lightweight, at only 3MB gzipped, and supports numerous Postgres extensions, including pgvector. It can function as an ephemeral in-memory database or persist data to the file system (Node/Bun/Deno) or IndexedDB (Browser). Unlike other "Postgres in the browser" projects, PGlite does not rely on a Linux virtual machine, instead leveraging Postgres's single-user mode compiled to WASM.

Best used for

Ideal for developers who need to embed a Postgres database directly into their applications, run Postgres in a browser environment, and build local-first or real-time applications. Especially valuable for projects requiring a lightweight, dependency-free database solution across various JavaScript runtimes.

Common actions

embed database

run Postgres locally

develop local-first apps

use Postgres in browser

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Capabilities

Key features

Embeddable Postgres in WASM
TypeScript client library
Runs in browser/Node.js/Bun/Deno
3MB gzipped size
Supports Postgres extensions
In-memory or persistent storage

Target Audience

developersweb developersapplication architects

Integrations

Not yet documented

Pricing & Plans

Open Source

Free

FAQs

What environments can PGlite run in?

PGlite is designed to run in a variety of JavaScript environments, including web browsers, Node.js, Bun, and Deno. It provides a consistent Postgres experience across these platforms without requiring external installations or dependencies.

How does PGlite handle data persistence?

PGlite offers flexible data persistence options. For Node.js, Bun, and Deno environments, it can persist data to the file system. In browser environments, PGlite utilizes IndexedDB for persistent storage, allowing data to remain available across sessions.

What are the main limitations of PGlite?

A primary limitation of PGlite is that it operates in a single-user/single-connection mode. This is due to the constraints of WebAssembly (WASM) environments, which do not support process forking, a mechanism typically used by PostgreSQL for multiple connections.

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