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.


On a Panguni Uthiram full moon, Vikram tied the thaali around Anjali’s neck. Kavya stood between them, holding both their hands. Vikram’s mother, in her fading memory, looked at them and smiled, murmuring, “Nalla jodi… en payan… avana nalla paathuko amma.”
"I don't miss the past, Aravind," she whispered, her voice barely rising above the sound of the distant waves. "I miss the feeling of being... seen. Being listened to. A woman doesn't just mourn a husband, she mourns the part of herself that used to be a beloved."
The world of Tamil romantic literature has always held a special place for stories that explore deep emotional bonds, unspoken sentiments, and the intricate dynamics of relationships. When readers search for a they are often looking for narratives that blend traditional Tamil values with modern storytelling, focusing on the unique, multifaceted relationship between a mother and her son.
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.
On a Panguni Uthiram full moon, Vikram tied the thaali around Anjali’s neck. Kavya stood between them, holding both their hands. Vikram’s mother, in her fading memory, looked at them and smiled, murmuring, “Nalla jodi… en payan… avana nalla paathuko amma.”
"I don't miss the past, Aravind," she whispered, her voice barely rising above the sound of the distant waves. "I miss the feeling of being... seen. Being listened to. A woman doesn't just mourn a husband, she mourns the part of herself that used to be a beloved."
The world of Tamil romantic literature has always held a special place for stories that explore deep emotional bonds, unspoken sentiments, and the intricate dynamics of relationships. When readers search for a they are often looking for narratives that blend traditional Tamil values with modern storytelling, focusing on the unique, multifaceted relationship between a mother and her son.
Simple, quick, and useful right out of the gate — designed to open-and-go.
Launch epanet-js now