Type-AgnosticOperationalTransformation

The OT engine that doesn't assume your deployment. Bring your own backend, network, and data structure.

Get Started GitHub

100%

Type-Safe

Dependencies

MIT

Licensed

Auto Demo

Document

Hello World

Operations Stream

Watch operations appear in real-time...

Live

Data Agnostic

Built-in Text type, fully extensible for JSON, rich-text, or custom structures. Define your transform function—OpenOT handles the rest.

Offline-First

Operations queue locally when offline. Automatic sync when connection returns. Your users never lose work.

Storage Pluggable

Redis, S3, Postgres, or anything. Implement getSnapshot() and appendOp() to use any database.

Transport Optional

WebSockets, HTTP-SSE, or build your own. Simple .send() and .onReceive() interface.

See OpenOT in Action

Type below to see actual OT operations generated in real-time using OpenOT's TextType

Text Editor

Cursor position: 11

Operations will appear here...

This demo uses @open-ot/core TextType to generate and apply operations locally

Installation

Get Started in Minutes

Choose your framework and start building collaborative applications

Install

npm install @open-ot/core @open-ot/client @open-ot/transport-websocket

Usage

1import { OTClient } from "@open-ot/client";
2import { TextType } from "@open-ot/core";
3import { WebSocketTransport } from "@open-ot/transport-websocket";
4
5const transport = new WebSocketTransport("ws://localhost:3000");
6
7const client = new OTClient({
8  type: TextType,
9  initialSnapshot: "Hello World",
10  initialRevision: 0,
11  transport: transport,
12});
13
14// Apply local changes
15client.applyLocal([{ r: 5 }, { i: " Alice" }]);