CodePal

Realtime code editor2022React, Node.js, Express, Socket.io

A collaborative code editor where up to 100 people edit the same file at once.

CodePal is a realtime collaborative code editor. People join a room with an ID and a username, and every keystroke syncs to everyone else over WebSockets.

The front end is React and the backend is Node and Express with Socket.io, deployed on Vercel. It supports syntax highlighting and up to 100 simultaneous editors in a room.

Editors per room: up to 100

GitHub

CodePal on a phone and a laptop: a join screen and a shared editor showing two connected users.