Code Editors: best apps and software

Replit

Replit is a cloud-based IDE that allows users to write code, collaborate, and deploy applications in various programming languages through a web browser.

Colaboratory

Colaboratory is a cloud-based data analysis tool that enables users to write and run Python code, collaborate, and access computing resources like GPUs within a Jupyter Notebook format.

Firebase Studio

Firebase Studio is a web-based development environment for building, testing, and deploying full-stack AI applications with integrated tools and real-time collaboration.

Visual Studio Code Web

Visual Studio Code Web is a browser-based coding platform that supports various programming languages, facilitating development without local installation.

Codepen

CodePen is an online platform for front-end web development that allows users to create, test, and share code snippets using HTML, CSS, and JavaScript.

GitHub Codespaces

GitHub Codespaces is a cloud-based development environment that allows developers to create and manage projects online using Visual Studio Code.

CodeSandbox

CodeSandbox is an online code editor that allows users to create, run, and share web apps collaboratively without complex setup.

GitHub Web Editor

The GitHub Web Editor allows users to edit, commit, and navigate code directly in their browser without cloning repositories.

PythonAnywhere

PythonAnywhere is a cloud platform for running and coding Python applications directly from your browser, without server management.

AWS Cloud9

AWS Cloud9 is a cloud-based IDE that enables coding, running, and debugging directly in a web browser, supporting collaboration and integration with AWS services.

myCompiler

myCompiler is an online IDE that allows users to edit, compile, and run code in various programming languages, including C, Java, Python, and more.

Wordware

Wordware is an IDE for collaboratively developing and deploying AI agents and applications, featuring tools for prompt management, API integration, and workflow optimization.

Gandi IDE

Gandi IDE is a collaborative coding platform based on Scratch, enabling students to create games together in-browser with various multiplayer features.

OnlineGDB

OnlineGDB is an online compiler and debugger for C/C++, offering code editing, execution, and debugging features accessible from any internet-connected device.

Deepnote

Deepnote is a collaborative data science notebook for teams, allowing real-time analysis, sharing, version control, and integration with various data sources.

Tailwind Play

Tailwind Play is an online playground for Tailwind CSS, allowing users to experiment with CSS features and build responsive web interfaces directly in the browser.

JSFiddle

JSFiddle is a web-based code editor for testing and sharing HTML, CSS, JavaScript, and CoffeeScript with real-time preview and collaboration features.

OneCompiler

OneCompiler is an online platform that allows users to write, compile, and run code in various programming languages directly in the browser.

EDA Playground

EDA Playground is a free web-based IDE for simulating and analyzing designs in SystemVerilog, Verilog, VHDL, and other EDA languages.

JDoodle

JDoodle is an online compiler and IDE that allows users to write, run, and share code in various programming languages directly from their browser.

Amp

Amp is a cloud IDE and coding agent that uses large‑context AI to edit, generate, refactor, and run code across 50+ languages, with collaborative editing and version control integration.

JupyterLite

JupyterLite is a web-based Jupyter notebook environment that allows users to create, edit, and run notebooks directly in the browser without local installations.

Phoenix Code Editor

The Phoenix Code Editor is a web-based IDE that enhances coding productivity with features like syntax highlighting, code completion, and project organization for various programming languages.

CoderPad

CoderPad is a platform for conducting live coding interviews and assessments, allowing candidates to write and run code in real-time across multiple programming languages.

StackBlitz

StackBlitz is an online code editor for web apps that offers real-time collaboration, GitHub integration, offline capabilities, and AI tools for efficient development.

Dcoder

Dcoder is a mobile and desktop IDE that allows users to write, compile, and run code in various programming languages anytime, anywhere.

Snail IDE

Snail IDE is a PenguinMod-based IDE that adds new blocks and features in extensions or the main toolbox for creating and editing projects.

Marblism

Marblism is a platform for quickly generating, editing, and hosting fullstack NextJS applications with no-code and coding options.

Coding Rooms

Coding Rooms is a platform for interactive coding education, enabling real-time collaboration and coding environment setup for various programming projects.

Expo Snack

Expo Snack is a web-based platform for writing and testing React Native apps, allowing real-time previews and sharing without local setup.

DartPad

DartPad is an online editor for programming in Dart, allowing users to write, run, and test Dart code directly in the browser with real-time feedback.

Remix IDE

Remix IDE is an open-source web-based development environment for writing, compiling, deploying, and debugging Ethereum smart contracts in Solidity.

Code Ocean

Code Ocean is a platform for collaborative, reproducible computational research, enabling users to develop, share, and execute code across various programming languages.

CodeGroundAI

CodeGroundAI is an online IDE that supports multiple programming languages, enables real-time collaboration, and offers features like autocomplete and code sharing.

JavaScript Playground

JavaScript Playground is an interactive online tool for writing, testing, and optimizing JavaScript code with real-time execution and collaboration features.

CoCalc

CoCalc is a cloud platform for collaborative computation and data analysis, supporting various programming languages and offering real-time collaboration tools.

CodeOrbital

CodeOrbital is an online code editor that supports multiple languages, real-time editing, project management, and collaboration, all within a single interface.

Bind AI

Bind AI is a platform that combines advanced AI models for code generation and content creation, featuring a code editor and support for over 70 programming languages.

Ona

Ona is an AI-driven platform that runs autonomous software engineering agents in sandboxed, ephemeral development environments, providing code editing, review, and secure execution.

CodeBanana

CodeBanana is a collaborative coding platform with real-time multiuser editing, project-aware AI that converts plain language to code, refactors and explains snippets, and shareable VMs.

PseudoEditor

PseudoEditor is a free online tool for writing and debugging pseudocode with features like syntax highlighting and a one-click pseudocode compiler.

Portugol Webstudio

Portugol Webstudio is a web-based platform for coding in Portugol, offering code editing, execution, debugging, and collaboration features for users.

Blink.new

Blink.new lets users build websites, web/mobile apps, and games without coding, using templates or community projects; it automates design, features, and quick prototyping.

Glitch

Glitch is a browser-based platform for creating and sharing web apps and sites, enabling real-time collaboration among users.

HTMEditor

HTMEditor is a free online HTML editor with WYSIWYG features, real-time editing, code completion, error detection, and support for collaboration.

db<>fiddle

db<>fiddle is an online SQL playground that allows users to create, execute, and share SQL queries across various database systems.

PlayCode

PlayCode is an online JavaScript playground for writing, testing, and sharing code snippets with live previews and support for frameworks like React and Vue.

Codeanywhere

Codeanywhere is a cloud-based IDE for web development, enabling editing, collaboration, and file management across devices.

Godot Engine Web Editor

The Godot Engine Web Editor is an online tool for creating and experimenting with 2D and 3D games without installing the native Godot software.

豆包MarsCode

豆包MarsCode is an AI-driven IDE and programming assistant that enhances coding with features like code generation and project management for various programming languages.

RunCode

RunCode is a cloud-based development platform providing pre-configured coding environments, real-time collaboration, and version control integration for teams and individuals.

PHPSandbox

PHPSandbox is a web app for writing, running, and testing PHP code snippets securely in the browser, ideal for prototyping and sharing PHP projects.

Codefile

Codefile is a collaborative online code editor for sharing and editing code snippets in real-time, aimed at developers for projects, interviews, and teaching.

easylang IDE

easylang is an online IDE for programming that simplifies coding with features like code editing, syntax highlighting, and debugging tools for learners and developers.

PopSQL

PopSQL is a collaborative SQL editor that streamlines database management, enabling users to write queries, visualize data, and share insights efficiently.

DB Fiddle

DB Fiddle is an online tool for testing, debugging, and sharing SQL snippets across various database systems.

SWISH

SWISH is an online platform for writing and executing Prolog code, facilitating the learning and development of logic programming without local installation.

MarsCode

MarsCode is a cloud-based IDE with an AI Assistant that supports over 100 programming languages, offering coding suggestions, error detection, and integration with other mainstream IDEs.

Kaitai Web IDE

The Kaitai Web IDE is an online tool for creating and editing Kaitai Struct definitions for parsing binary data formats with features like syntax highlighting and real-time parsing.

1code

Control panel for AI coding agents that runs Claude Codes in parallel locally or in remote sandboxes, automates Linear tasks, and manages pull request reviews for development teams.