Repl.it is a San Francisco-based start-up and online IDE. It allows developers to write code, build, and host apps or websites from their browser. There are over 50 supported languages from Python and Ruby to LOLCODE and QBasic.

Official repository for IPython itself. Other repos in the IPython organization contain things like the website, documentation builds, etc.

• UpdatedFeb 19, 2026
• Python

Virtual Machine for the Web

• UpdatedFeb 18, 2026
• JavaScript

TypeScript execution and REPL for node.js

• UpdatedJul 18, 2024
• TypeScript

jq for binary formats - tool, language and decoders for working with binary and text formats

• UpdatedFeb 17, 2026
• Go

A REPL for PHP

• UpdatedFeb 20, 2026
• PHP

Powerful REPL for the Laravel framework.

• UpdatedFeb 10, 2026
• PHP

📘 The interactive computing suite for you! ✨

• UpdatedDec 30, 2023
• TypeScript

A new kind of Progress Bar, with real-time throughput, ETA, and very cool animations!

• UpdatedOct 10, 2025
• Python

Red is a next-generation programming language strongly inspired by Rebol, but with a broader field of usage thanks to its native-code compiler, from system programming to high-level scripting and cross-platform reactive GUI, while providing modern support for concurrency, all in a zero-install, zero-config, single ~1MB file!

• UpdatedFeb 18, 2026
• Red

A statically typed lisp, without a GC, for real-time applications.

• UpdatedFeb 19, 2026
• Haskell

A dynamic language and bytecode vm

• UpdatedFeb 20, 2026
• C

Run code interactively, inspect data, and plot. All the power of Jupyter kernels, inside your favorite text editor.

• UpdatedFeb 20, 2026
• TypeScript

Write like a high-level language, run like C.

• UpdatedFeb 20, 2026
• C

A static, type inferred and embeddable language written in Rust.

• UpdatedDec 6, 2024
• Rust

Debugging in Ruby

• UpdatedFeb 12, 2026
• Ruby

A command line C# REPL with syntax highlighting – explore the language, libraries and nuget packages interactively.

• UpdatedFeb 2, 2026
• C#

An advanced discord music bot, supports Spotify, Soundcloud, YouTube with Shuffling, Volume Control and Web Dashboard with Slash Commands support!

• UpdatedFeb 20, 2026
• HTML

📔 The interactive scratchpad for hackers.

• UpdatedFeb 28, 2023
• Vim Script

An interactive REPL for Go that allows you to drop into your code at any point.

• UpdatedFeb 21, 2023
• Go

Figwheel builds your ClojureScript code and hot loads it into the browser as you are coding!

• UpdatedMar 26, 2024
• Clojure