RxDB - A client side, offline-first, reactive database for JavaScript Applications

The perfect Database for JavaScript applications

Realtime Queries
Realtime Replication
Works Offline
Supports all major JavaScript runtimes
Great Performance
Easy to learn

Realtime applications made easy

From the results of a query, to a single field of a document, with RxDB you can observe everything. This enables you to build realtime applications fast and reliable. Whenever your data changes, your UI reflects the new state.

Write await collection.upsert({ id: 'foobar', color: '#e6008d' });

Observe await collection.findOne('foobar') .$ // get observable .subscribe(d => { screen.backgroundColor = d.color; });

Replicate with your existing infrastructure

RxDB supports replication with a CouchDB server or any custom GraphQL endpoint which smoothly integrates with your existing infrastructure. Also you can use the replication primitives plugin to create custom replications over any protocol like REST, Websocket, p2p or Firestore.

{ REST }

websocket

p2p

Online is optional

RxDB follows the Offline First paradigm where an application must work as well offline as it does online. This is done by persisting data on the client side and replicating it in the background. RxDB can even be used solely on the client side, with no backend at all.

Your application still works offline
Increases perceived performance
Easier and faster implementation
Needs less backend resources and scales better

Angular

Capacitor

Cordova

Node.js

React

Svelte

Flexible storage layer

RxDB is based on a storage interface that enables you to swap out the underlying storage engine. This increases code reuse because the same database code can be used in any JavaScript runtime by just switching out the storage settings.

NativeScript

Next.js

Trusted and open source

Github Stars

18165

npm downloads

238572

Contributors

133

Commits

6891

Projects build with RxDB

825

Twitter followers

2762

Pricing Models

RxDB Basics

Free & Open Source

Basic RxStorages
Realtime Replication
Live Queries
Schema Validation
Multi-Tab Support
Encryption
Compression

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Premium Plugins

for professionals to get the most out of RxDB

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Consulting Session

fast in person consulting

Book a one hour consulting session with the RxDB maintainer. I will answer all your questions, give proposals for your use case and we can even do a pair programming session if you have a specific problem in your source code.
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