SQLite Sync extension packaged for Node.js

SQLite Sync is a multi-platform extension that brings a true local-first experience to your applications with minimal effort. It extends standard SQLite tables with built-in support for offline work and automatic synchronization, allowing multiple devices to operate independently—even without a network connection—and seamlessly stay in sync. With SQLite Sync, developers can easily build distributed, collaborative applications while continuing to rely on the simplicity, reliability, and performance of SQLite.

Under the hood, SQLite Sync uses advanced CRDT (Conflict-free Replicated Data Type) algorithms and data structures designed specifically for collaborative, distributed systems. This means:

• Devices can update data independently, even without a network connection.
• When they reconnect, all changes are merged automatically and without conflicts.
• No data loss. No overwrites. No manual conflict resolution.

In simple terms, CRDTs make it possible for multiple users to edit shared data at the same time, from anywhere, and everything just works.

• ✅ Bidirectional Sync - Sync local SQLite databases with cloud storage
• ✅ Conflict Resolution - Intelligent conflict handling and resolution
• ✅ Offline-First - Full functionality without network connectivity
• ✅ Cross-platform - Works on macOS, Linux (glibc/musl), and Windows
• ✅ Zero configuration - Automatically detects and loads the correct binary for your platform
• ✅ TypeScript native - Full type definitions included
• ✅ Modern ESM + CJS - Works with both ES modules and CommonJS

npm install @sqliteai/sqlite-sync

The package automatically downloads the correct native extension for your platform during installation.

For detailed information on how to use the sync extension features, see the main documentation.

import { getExtensionPath } from '@sqliteai/sqlite-sync';
import Database from 'better-sqlite3';

const db = new Database(':memory:');
db.loadExtension(getExtensionPath());

// Ready to use
const version = db.prepare('SELECT cloudsync_version()').pluck().get();
console.log('Sync extension version:', version);

For complete, runnable examples, see the sqlite-extensions-guide.

These examples are generic and work with all SQLite extensions: sqlite-vector, sqlite-sync, sqlite-js, and sqlite-ai.

Returns the absolute path to the SQLite Sync extension binary for the current platform.

Returns: string - Absolute path to the extension file (.so, .dylib, or .dll)

Throws: ExtensionNotFoundError - If the extension binary cannot be found for the current platform

Returns detailed information about the extension for the current platform.

Returns: ExtensionInfo object with the following properties:

• platform: Platform - Current platform identifier (e.g., 'darwin-arm64')
• packageName: string - Name of the platform-specific npm package
• binaryName: string - Filename of the binary (e.g., 'cloudsync.dylib')
• path: string - Full path to the extension binary

Throws: ExtensionNotFoundError - If the extension binary cannot be found

Example:

import { getExtensionInfo } from '@sqliteai/sqlite-sync';

const info = getExtensionInfo();
console.log(`Running on ${info.platform}`);
console.log(`Extension path: ${info.path}`);

Returns the current platform identifier.

Returns: Platform - One of:

• 'darwin-arm64' - macOS ARM64
• 'darwin-x86_64' - macOS x86_64
• 'linux-arm64' - Linux ARM64 (glibc)
• 'linux-arm64-musl' - Linux ARM64 (musl)
• 'linux-x86_64' - Linux x86_64 (glibc)
• 'linux-x86_64-musl' - Linux x86_64 (musl)
• 'win32-x86_64' - Windows x86_64

Throws: Error - If the platform is unsupported

Detects if the system uses musl libc (Alpine Linux, etc.).

Returns: boolean - true if musl is detected, false otherwise

Error thrown when the SQLite Sync extension cannot be found for the current platform.

• @sqliteai/sqlite-vector - Vector search and similarity matching
• @sqliteai/sqlite-ai - On-device AI inference and embedding generation
• @sqliteai/sqlite-js - Define SQLite functions in JavaScript

This project is licensed under the Elastic License 2.0.

For production or managed service use, please contact SQLite Cloud, Inc for a commercial license.

Contributions are welcome! Please see the main repository to open an issue.

• 📖 Documentation
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