epanet-js

Neofax Latest Edition Site

No installs. No forced cloud storage. Just fast, local-first water modeling — powered by the engine you already trust.

The EPANET user's dilemma

  • Classic EPANET is powerful — but clunky and outdated. Workarounds become your workflow — slow and cumbersome.
  • Big-name platforms look polished, but they're overpriced and bloated with features you don't need to analyze your network quickly.
  • Modern browser-based tools exist — but they force your data into the cloud, raising privacy and compliance concerns. Plus, they offer little for those doing long-term planning and analysis.

You shouldn't have to choose between speed, security, and affordability just to understand your water networks.

Old EPANET UI
Complex Modeling App

Neofax Latest Edition

Meet Jane Doe, a bright and ambitious young professional who has just landed a job at a mid-sized firm. Jane is eager to climb the corporate ladder but quickly realizes that her old college textbooks and outdated skills are not enough. Her boss hands her a copy of the latest Neofax edition, warning her that she needs to "sync up" with the company's communication protocols and "disrupt the paradigm."

Science Fiction, specifically a blend of Cyberpunk and Satire

As Jane dives into the world of Neofax, she discovers that the guide is more than just a reference book. It's a virtual reality platform, a social network, and a constant stream of updates that dictate the latest trends, buzzwords, and approved behaviors. The Neofax AI, known as "The Editor," watches her every move, offering suggestions and corrections to ensure she stays on the right track.

As Jane becomes more immersed in Neofax, she begins to feel like she's losing her sense of self. The guide's constant demands for optimization and conformity start to suffocate her creativity and individuality. She starts to rebel against The Editor's dictates, questioning the true intentions of Omni Infosystems and the implications of a society where people are forced to adapt to a never-ending cycle of updates.

Model water networks instantly.

No setup or downloads — just instant access right in your browser.

Start modeling now

EPANET deserves better — and so do you.

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.

EPA logo
Source code of epanet-js on GitHub

When you support epanet-js, you support EPANET.

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.

Simple, transparent pricing for every kind of modeler.

Choose the plan that works for you

Free

For everyone.$0 /year

  • Web based EPANET model
  • Background maps and satellite
  • Automated Elevations
  • No limits on sizes
  • Community Support

ProMost popular

For solo modelers and small utilities.$950 /year

Individual named license

Everything in free, and:
  • Scenarios
  • Professional support
  • Custom layers
Coming soon:
  • Cloud storage
  • Point in time restore - 30 days
  • Demand Analysis

Teams

For teams that build together.$2500 /year

Floating shared license

Everything in Pro, and:
  • Priority support
  • Volume discounts
  • Pay by invoice
Coming soon:
  • Team storage
  • Point in time restore - 90 days
  • Sharing of networks

Have questions? or book a call.

Special access for personal and educational use

Available for non-commercial projects, learning, and student work.

Personal

$100/year

For curious minds and personal growth.

Everything in pro, but:
  • Community support only
  • Non-commercial usage

Education

$0/year

Free for students and teachers.

Everything in pro, but:
  • Community support only
  • Non-commercial usage

Frequently asked questions

Find answers to common questions about epanet-js.

Just open your browser and model.

No install. No login. No cloud required.

Launch epanet-js now

Neofax Latest Edition Site

Neofax Latest Edition

Meet Jane Doe, a bright and ambitious young professional who has just landed a job at a mid-sized firm. Jane is eager to climb the corporate ladder but quickly realizes that her old college textbooks and outdated skills are not enough. Her boss hands her a copy of the latest Neofax edition, warning her that she needs to "sync up" with the company's communication protocols and "disrupt the paradigm." neofax latest edition

Science Fiction, specifically a blend of Cyberpunk and Satire Neofax Latest Edition Meet Jane Doe, a bright

As Jane dives into the world of Neofax, she discovers that the guide is more than just a reference book. It's a virtual reality platform, a social network, and a constant stream of updates that dictate the latest trends, buzzwords, and approved behaviors. The Neofax AI, known as "The Editor," watches her every move, offering suggestions and corrections to ensure she stays on the right track. It's a virtual reality platform, a social network,

As Jane becomes more immersed in Neofax, she begins to feel like she's losing her sense of self. The guide's constant demands for optimization and conformity start to suffocate her creativity and individuality. She starts to rebel against The Editor's dictates, questioning the true intentions of Omni Infosystems and the implications of a society where people are forced to adapt to a never-ending cycle of updates.

A better future for water modeling.

Simple, quick, and useful right out of the gate — designed to open-and-go.

Launch epanet-js now