We present Pyro, a framework for enabling domain-specific modeling via the internet. Provided with an adequate metamodel specification, Pyro turns your browser into a collaborative, domain-specific, graphical development environment with features reminiscent of desktop IDEs for textual programming languages. The required metamodeling is supported in a high-level, simplicity-driven fashion, and the entire ready-to-run browser-based domain-specific development environment is generated fully automatically. We will illustrate the steps of this development along the realization of a graphical IDE for the Architecture Analysis and Design Language (AADL).