SQLite Wasm

SQLite Wasm conveniently wrapped as an ES Module.

Installation

npm install @sqlite.org/sqlite-wasm

Bug reports

[!Warning]

This project wraps the code of SQLite Wasm with no changes, apart from added TypeScript types. Please do not file issues or feature requests regarding the underlying SQLite Wasm code here. Instead, please follow the SQLite bug filing instructions. Filing TypeScript type related issues and feature requests is fine.

Node.js support

[!Warning]

Node.js is currently only supported for in-memory databases without persistence.

Usage

There are two ways to use SQLite Wasm:

• in a worker
• in the main thread

Only the worker versions allow you to use the origin private file system (OPFS) storage back-end.

In a worker (with OPFS):

[!Warning]

For this to work, you need to set the following headers on your server:

Cross-Origin-Opener-Policy: same-origin

Cross-Origin-Embedder-Policy: require-corp

// In `main.ts`.
const worker = new Worker(new URL('./worker.ts', import.meta.url), { type: 'module' });

// In `worker.ts`.
import sqlite3InitModule from '@sqlite.org/sqlite-wasm';

const sqlite3 = await sqlite3InitModule();

console.log('Running SQLite3 version', sqlite3.version.libVersion);

const db = new sqlite3.oo1.OpfsDb('/mydb.sqlite3');

try {
  // Your SQLite code here.
} finally {
  db.close();
}

The db object above implements the Object-Oriented API #1.

In the main thread (without OPFS):

import sqlite3InitModule from '@sqlite.org/sqlite-wasm';

const sqlite3 = await sqlite3InitModule();

console.log('Running SQLite3 version', sqlite3.version.libVersion);

const db = new sqlite3.oo1.DB('/mydb.sqlite3', 'ct');

try {
  // Your SQLite code here.
} finally {
  db.close();
}

The db object above implements the Object-Oriented API #1.

Usage with Vite

If you are using Vite, you need to add the following config option in vite.config.ts:

import { defineConfig } from 'vite';

export default defineConfig({
  server: {
    headers: {
      'Cross-Origin-Opener-Policy': 'same-origin',
      'Cross-Origin-Embedder-Policy': 'require-corp',
    },
  },
  optimizeDeps: {
    exclude: ['@sqlite.org/sqlite-wasm'],
  },
});

See our OPFS and SAH pool examples for working Vite projects.

Examples

• Main thread
• Worker
• OPFS
• OPFS with Web Locks
• Key-value storage (kvvfs)
• SAH pool with Vite
• SAH pool with webpack
• SAH pool with Parcel
• SAH pool with Rsbuild

Projects using this package

See the list of npm dependents for this package.

Contributing

See CONTRIBUTING.md for deployment, local build, and testing instructions.

Deprecations

The Worker1 and Promiser1 APIs are, as of 2026-04-15, deprecated. They will not be removed, but they also will not be extended further. It is their author's considered opinion that they are too fragile, too imperformant, and too limited for any non-toy software, and their use is actively discouraged. The "correct" way to use this library is documented in Usage section above.

Acknowledgements

This project is based on SQLite Wasm, which it conveniently wraps as an ES Module and publishes to npm as @sqlite.org/sqlite-wasm.