Remix is the web-based environment for the development and testing of contracts using Solidity. It is a feature-rich IDE which does not run on live blockchain; in fact, it is a simulated environment in which contracts can be deployed, tested, and debugged.
An example interface is shown as follows:
On the left-hand side, there is a code editor with syntax highlighting and code formatting, and on the right-hand side, there are a number of tools available that can be used to deploy, debug, test, and interact with the contract.
Various features, such as transaction interaction, options ...