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.


These downloads are a primary way for hackers to spread ransomware, keyloggers, and spyware. They often trick you into disabling your antivirus to "install the crack," leaving your computer defenseless.
If you have a locked WinRAR file and forgot the password, there are legitimate (though not always easy) ways to try and recover it:
There are legitimate tools (like PassFab or John the Ripper ) that use "Brute Force" or "Dictionary Attacks" to try and guess the password.
Files with these types of names are almost always or scams . Here is why you should be careful and what you can do instead: 🚩 Why to Avoid "Cracks" and "Activation Keys"
Using "cracked" software violates terms of service and can lead to security vulnerabilities since these programs cannot be updated. ✅ Safe Ways to Handle a Forgotten WinRAR Password
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.
These downloads are a primary way for hackers to spread ransomware, keyloggers, and spyware. They often trick you into disabling your antivirus to "install the crack," leaving your computer defenseless.
If you have a locked WinRAR file and forgot the password, there are legitimate (though not always easy) ways to try and recover it:
There are legitimate tools (like PassFab or John the Ripper ) that use "Brute Force" or "Dictionary Attacks" to try and guess the password.
Files with these types of names are almost always or scams . Here is why you should be careful and what you can do instead: 🚩 Why to Avoid "Cracks" and "Activation Keys"
Using "cracked" software violates terms of service and can lead to security vulnerabilities since these programs cannot be updated. ✅ Safe Ways to Handle a Forgotten WinRAR Password
Simple, quick, and useful right out of the gate — designed to open-and-go.
Launch epanet-js now