Engineering Blog

Technical insights from the people building Replit.

A New Code Editor for Mobile - CodeMirror 6

Writing code on a touchscreen deserves a better editor. CodeMirror 6 brings a mobile-first editing experience to Replit.

09/21/21

A Python prompt and a page of HTTP logs became unlikely chat rooms. Two stories about people finding ways to make the internet more fun.

02/02/21

A user found a token bug that granted access to someone else’s project. We explain what went wrong and how we responded.

12/03/20

Slow setup and fragile workflows creep up on a team. Here’s how onboarding, automation, and a closer look at daily work can catch them.

06/04/18

What could developer tools do if editing, running, and deploying code weren’t separate jobs? A case for bringing the whole process together.

03/27/17

From manually starting servers to automating deployments: the mistakes and lessons behind scaling Replit’s code execution service on AWS.

11/14/16

An archived guide to running code through Replit’s HTTP and WebSocket API, with examples and setup instructions. The API was retired in October 2022.

06/24/16