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.


Open the link in an Incognito window (Ctrl+Shift+N). This disables extensions and ignores old cookies. If the link works in Incognito, a browser extension is likely blocking the access.
Sometimes, this is simply a configuration error. A company may have uploaded a new sustainability report but forgot to change the file permissions from "Internal Only" to "Public."
access denied https wwwxxxxcomau sustainability hot link
Do not click the link directly. Instead, open a new browser window and type the main domain address manually (e.g., www.xxxx.com.au ). Once there, use the website's navigation menu to find "Sustainability." This avoids errors caused by bad hyperlinks.
No setup or downloads — just instant access right in your browser.
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
Base cost
User
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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.
No install. No login. No cloud required.
Open the link in an Incognito window (Ctrl+Shift+N). This disables extensions and ignores old cookies. If the link works in Incognito, a browser extension is likely blocking the access.
Sometimes, this is simply a configuration error. A company may have uploaded a new sustainability report but forgot to change the file permissions from "Internal Only" to "Public."
access denied https wwwxxxxcomau sustainability hot link
Do not click the link directly. Instead, open a new browser window and type the main domain address manually (e.g., www.xxxx.com.au ). Once there, use the website's navigation menu to find "Sustainability." This avoids errors caused by bad hyperlinks.
Simple, quick, and useful right out of the gate — designed to open-and-go.
Launch epanet-js now