Best Offline-First Databases for JavaScript
View:
Compare the Top Offline-First Databases that integrate with JavaScript as of June 2025
Sort By:
This a list of Offline-First Databases that integrate with JavaScript. Use the filters on the left to add additional filters for products that have integrations with JavaScript. View the products that work with JavaScript in the table below.
What are Offline-First Databases for JavaScript?
Offline-first databases are systems designed to prioritize local data storage and enable applications to function seamlessly even when there is no internet connection. These databases store data on the device itself, allowing users to access, modify, and interact with their data offline. When the device reconnects to the internet, the database syncs with the remote server, ensuring that any changes made offline are reflected in the cloud or central database. Offline-first databases are ideal for mobile applications, remote work environments, or any scenario where constant internet access is unreliable. By using these databases, developers can ensure that users have a consistent and uninterrupted experience, regardless of connectivity. Compare and read user reviews of the best Offline-First Databases for JavaScript currently available using the table below. This list is updated regularly.
-
1
PouchDB
PouchDB
PouchDB is an open source JavaScript database inspired by Apache CouchDB, designed to run efficiently within the browser. It enables applications to store data locally while offline and synchronize it with CouchDB and compatible servers when back online, ensuring user data remains in sync across sessions. PouchDB supports cross-browser functionality, is lightweight, requires just a script tag and 46KB (gzipped) in the browser, and can be installed via npm. It is easy to learn, requiring some programming knowledge, and is fully open source, with development conducted openly on GitHub. PouchDB allows developers to build applications that function seamlessly offline and online, providing a consistent user experience regardless of network connectivity. It offers a simple API for creating, reading, updating, and deleting documents.Starting Price: Free -
2
RxDB
RxDB
RxDB is a local-first, NoSQL JavaScript database optimized for modern web and mobile applications. It enables offline-first functionality by storing data directly on the client using storage engines like IndexedDB, OPFS, SQLite, and more. RxDB offers real-time reactivity, allowing developers to subscribe to changes in documents, fields, or queries, ensuring that UI components update automatically as data changes. Its flexible replication engine supports syncing with various backends and custom endpoints. RxDB integrates seamlessly with frameworks and environments. Additional features include field-level encryption, schema validation, conflict resolution, backup and restore, attachments, and CRDT support. By reducing server load and providing low-latency local queries, RxDB enhances performance and scalability, making it ideal for applications that require real-time updates, offline access, and cross-platform consistency.Starting Price: Free -
3
IndexedDB
Mozilla
IndexedDB is a low-level API for client-side storage of significant amounts of structured data, including files/blobs. This API uses indexes to enable high-performance searches of this data. While web storage is useful for storing smaller amounts of data, it is less useful for storing larger amounts of structured data. IndexedDB provides a solution. IndexedDB is a transactional database system, like an SQL-based Relational Database Management System (RDBMS). However, unlike SQL-based RDBMSes, which use fixed-column tables, IndexedDB is a JavaScript-based object-oriented database. IndexedDB lets you store and retrieve objects that are indexed with a key; any objects supported by the structured clone algorithm can be stored. You need to specify the database schema, open a connection to your database, and then retrieve and update data within a series of transactions. Like most web storage solutions, IndexedDB follows the same-origin policy.Starting Price: Free -
4
WatermelonDB
WatermelonDB
WatermelonDB is a reactive database framework designed to build powerful React and React Native apps that scale from hundreds to tens of thousands of records while remaining fast. It ensures instant app launch regardless of data volume, supports lazy loading to load data only when needed, and offers offline-first capabilities with synchronization to your own backend. It is multiplatform. Optimized for React, it allows easy integration of data into components and is framework-agnostic, enabling the use of its JavaScript API with other UI frameworks. Built on a robust SQLite foundation, WatermelonDB provides static typing with Flow or TypeScript and optional reactivity through an RxJS API. WatermelonDB addresses performance issues in complex applications by loading nothing until requested and performing all querying directly on SQLite on a separate native thread, ensuring most queries resolve instantly.Starting Price: Free -
5
Realm
Realm DB
Realm is a mobile-first, open source object database designed to run directly inside phones, tablets, and wearables. It provides a simple, object-oriented data model that eliminates the need for an ORM, allowing developers to define models as regular classes in languages like Swift, Java, Kotlin, C#, JavaScript, Dart, and C++. Realm's architecture ensures high performance and low memory usage by employing a zero-copy design, lazy loading, and multi-version concurrency control (MVCC) for thread-safe operations. It's live objects and collections automatically update across threads, enabling reactive programming patterns. Realm supports relationships between objects via links and backlinks, facilitating complex data structures. Developers can utilize tools like Realm Studio to inspect and manipulate local Realm databases and integrate Realm into various platforms, including React Native, Flutter, Xamarin, and Node.js.Starting Price: Free -
6
OrbitDB
OrbitDB
OrbitDB is a serverless, distributed, peer-to-peer database that utilizes IPFS for data storage and Libp2p Pubsub for automatic synchronization across peers. It employs Merkle-CRDTs to ensure conflict-free database writes and merges, making it suitable for decentralized applications, blockchain integrations, and local-first web apps. OrbitDB offers various database types tailored to different use cases: 'events' for immutable append-only logs, 'documents' for JSON document storage indexed by a specified key, 'keyvalue' for traditional key-value pairs, and 'keyvalue-indexed' for LevelDB-indexed key-value data. All these databases are built atop OpLog, an immutable, cryptographically verifiable, operation-based CRDT structure. The JavaScript implementation supports both browser and Node.js environments, with a Go version maintained by the Berty project.Starting Price: Free
- Previous
- You're on page 1
- Next