All-in-one
Define metamodels, design concrete syntaxes, write transformations, and apply refactorings. AI-assisted at every step. One tool, one environment. No integration headaches.
Coming soon
Jjodel 3.0
A completely redesigned metamodeling experience. New transformation engine, new expression language, new UI.
Open-source metamodeling platform
Define languages.
Create models.
See results instantly.
Cloud-based metamodeling workbench for research and education. Define your DSL, create models, apply transformations, and collaborate in real time. No installation. No code generation.
Zero friction
Open a browser, sign in, start working. Nothing to install, nothing to configure. Progressive disclosure keeps the interface simple until you need more.
Collaborative
Share projects in real-time with shared rooms. Students, colleagues, and reviewers work on the same models simultaneously. No files to exchange.
Latest activity
- Project Jjodel joins AIM-PRO (ERASMUS-EDU-2025) ↗ EU Project
- Talk Real-Time Rooms for Collaborative Modeling LangDev 2025, Amsterdam
- Keynote The Evolutionary Life of Metamodels ↗ MODELS 2025, Grand Rapids
- Talk The Cognitive Science of Modeling Tools ↗ TU Wien, Vienna
- Keynote Transparency of Tools: Beyond Usability in Modeling Tools ↗ MODELSWARD 2025, Porto
- Paper Modeling in Jjodel: towards bridging complexity and usability in MDE ↗ SoSyM 2025
For educators
Students open a browser and start modeling. No Eclipse, no EMF, no lab setup. Jjodel runs on any device with a browser. Used in MDE courses at Università dell'Aquila, Mälardalen University, and academic tutorials at MODELS and MLE.
Teaching with Jjodel →
Research partners
Università dell'Aquila
Mälardalen University
Fondazione Bruno Kessler
AIM-PRO (ERASMUS-EDU)
Ready to try?
Free, open-source, MIT-licensed. No account required to explore.