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.


: While .rar files are common, attackers use them to hide malicious executables from basic antivirus scans. Recommended Actions
: Simply downloading a .rar file is usually safe, but extracting or running the files inside can infect your system.
: The term "Rogue" is also commonly used for fake antivirus software that tricks users into paying for "cleaning" a non-existent infection.
If you have received an email or file with the subject , be extremely cautious. This is a known naming convention used in malware campaigns . ⚠️ Security Warning
: Before touching the contents, upload the file to VirusTotal to check it against dozens of antivirus engines.
: Security researchers have identified "Rogue" as a specific strain of mobile and PC malware. It is often classified as scareware or a Remote Access Trojan (RAT) that can steal usernames, passwords, photos, and location data.
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.
: While .rar files are common, attackers use them to hide malicious executables from basic antivirus scans. Recommended Actions
: Simply downloading a .rar file is usually safe, but extracting or running the files inside can infect your system.
: The term "Rogue" is also commonly used for fake antivirus software that tricks users into paying for "cleaning" a non-existent infection.
If you have received an email or file with the subject , be extremely cautious. This is a known naming convention used in malware campaigns . ⚠️ Security Warning
: Before touching the contents, upload the file to VirusTotal to check it against dozens of antivirus engines.
: Security researchers have identified "Rogue" as a specific strain of mobile and PC malware. It is often classified as scareware or a Remote Access Trojan (RAT) that can steal usernames, passwords, photos, and location data.
Simple, quick, and useful right out of the gate — designed to open-and-go.
Launch epanet-js now