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.


The existence of the Index of Naajayaz raises important questions about the nature of information sharing and access on the internet. While some argue that it represents a threat to intellectual property rights and public safety, others see it as a manifestation of the internet's potential for free expression and information exchange.
At its core, the Index of Naajayaz appears to be a catalog or directory of sorts, purportedly containing links to or information about content that is deemed illicit, explicit, or otherwise restricted. This could include anything from pirated software and movies to more dubious materials that exist on the fringes of the internet. index of naajayaz
Regardless of its origins, the Index of Naajayaz has become a term that is whispered about in online circles, with many individuals claiming to have stumbled upon it or know someone who has. However, concrete evidence of its existence remains elusive, fueling speculation and curiosity. The existence of the Index of Naajayaz raises
The origins of the Index of Naajayaz are shrouded in mystery. Some claim that it emerged from the depths of the dark web, a part of the internet that is not indexed by traditional search engines and requires specialized software to access. Others believe that it may have originated from a particular online community or forum that focused on sharing illicit content. This could include anything from pirated software and
In the vast expanse of the internet, there exist numerous repositories of information, some of which are shrouded in mystery and secrecy. One such enigmatic entity is the "Index of Naajayaz," a term that has piqued the curiosity of many a netizen. What exactly is this index, and what secrets does it hold? In this article, we will embark on a journey to unravel the mysteries surrounding the Index of Naajayaz.
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.
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Floating shared license
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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.
You may not know this, but for decades, the U.S. EPA has given the water industry an extraordinary gift: the free and open-source hydraulic modeling software EPANET. Odds are, if you've used any commercial hydraulic modeling software today, it was built on the EPANET engine.
The problem is, instead of giving back to their open-source roots like other industries do, big-name software vendors took EPANET's open code, built private tools on top of the engine, and then locked those improvements behind patents and proprietary licenses.
Some vendors even pressured the EPA to focus only on the engine — discouraging any effort to improve the interface or user experience for everyone else.
Those vendors now charge you exorbitant prices to use their software while EPANET lags behind — and utilities, engineers, and educators with smaller budgets suffer.
We think this is backwards — and we're on a mission to change it. We're focused on creating a better experience for the entire hydraulic modeling community.
That's why we built epanet-js under an FSL license — because we want to give you an affordable, easy-to-use water modeling option that creates a sustainable future for open-source EPANET development.
Support EPANET by using software that supports it back.
Simple, quick, and useful right out of the gate — designed to open-and-go.
Launch epanet-js now