epanet-js
No installs. No forced cloud storage. Just fast, local-first water modeling — powered by the engine you already trust.
You shouldn't have to choose between speed, security, and affordability just to understand your water networks.


: Your success depends on who you appeal to; for example, the "Minimalism Ending" requires using precision tools and a limited color palette to impress specific critics. Technical Requirements (PC)
: You can download the early Passpartout Prototype for free on Itch.io. It was developed in about a week to test the core concept before the full game was built. Game Overview
The game challenges you to balance creativity with survival:
is a charming art simulation game where you play as a French painter struggling to survive the competitive art scene. While "free download" full versions for PC are often advertised on third-party sites, the official full game is a paid title available on reputable platforms like Steam and GOG . Legitimate Ways to Play for Free
To run the full version smoothly on your PC, ensure your system meets these recommended specifications: : Windows 7 or later CPU : Intel Core i5 or equivalent Memory : 2 GB RAM Graphics : GeForce GTX 680 or Radeon HD 7970 Storage : 2 GB available space Sequel and Mobile Versions Passpartout: The Starving Artist on Steam
: Draw your own paintings on a digital canvas and sell them to AI customers to pay for your "expensive wine and baguette addiction".
EPANET was a gift to the industry — free, open-source water modeling for all. But commercial vendors built on it, locked away improvements, and left the community behind.
epanet-js is our answer: a faster, simpler, affordable water modeling tool that protects your privacy and sustains the open-source future of water modeling.
We're proud to be part of the next chapter — and we're just getting started.

When you purchase more features in epanet-js, you're investing in the future of open-source EPANET development.
Our open-source model balances innovation and accessibility:
Anyone can build on our code. The two-year commercial-use delay gives us the incentive to keep pushing forward — and that fuels progress for everyone.
That means when you support us, you support more affordable hydraulic modeling software for the entire community.
Choose the plan that works for you
Individual named license
Floating shared license
Have questions? or book a call.
Available for non-commercial projects, learning, and student work.
For curious minds and personal growth.
Free for students and teachers.
Find answers to common questions about epanet-js.
: Your success depends on who you appeal to; for example, the "Minimalism Ending" requires using precision tools and a limited color palette to impress specific critics. Technical Requirements (PC)
: You can download the early Passpartout Prototype for free on Itch.io. It was developed in about a week to test the core concept before the full game was built. Game Overview : Your success depends on who you appeal
The game challenges you to balance creativity with survival: Game Overview The game challenges you to balance
is a charming art simulation game where you play as a French painter struggling to survive the competitive art scene. While "free download" full versions for PC are often advertised on third-party sites, the official full game is a paid title available on reputable platforms like Steam and GOG . Legitimate Ways to Play for Free : Your success depends on who you appeal
To run the full version smoothly on your PC, ensure your system meets these recommended specifications: : Windows 7 or later CPU : Intel Core i5 or equivalent Memory : 2 GB RAM Graphics : GeForce GTX 680 or Radeon HD 7970 Storage : 2 GB available space Sequel and Mobile Versions Passpartout: The Starving Artist on Steam
: Draw your own paintings on a digital canvas and sell them to AI customers to pay for your "expensive wine and baguette addiction".
Simple, quick, and useful right out of the gate — designed to open-and-go.
Launch epanet-js now