Cosmo is a light weight browser-based IDE for the Solidity contract language, built in MeteorJS. Deploy, test, and vet contracts at light-speed!


Built for DApp developers hungry for a browser based solidity IDE, Cosmo takes light-weight to a whole new level, so that developing your next Ethereum project is as simple as code, deploy, test and lift-off!


Cosmo has a range of features to make developing your next Ethereum contract as fast and painless as possible.

Compiler Toggling

Switch between automatic and manual compiling modes so that bigger contracts dont slow your browser down.

Quick Deploy

Easily deploy your contract to the Ethereum blockchain so that you can actually vet and test your contract.

Method Testing

A complete method testing interface for vetting your contract's functions at light-speed.