epanet-js

French Christmas Celebration Enature Better -

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

Launch epanet-js. No login needed.Book a demo

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  • Classic EPANET is powerful — but clunky and outdated.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

A French Christmas (Noël) celebration inherently leans toward nature, simplicity, and tradition, making it naturally "better" for those seeking an eco-conscious or rustic holiday. From the evergreen sapin de Noël to the symbolic bûche de Noël

Christmas in France: Traditions, Markets & Celebrations Guide

: While modern families may decorate earlier, old customs favored setting up the tree on Christmas Eve to preserve its freshness and magic. Gastronomy Rooted in the Earth

The French Christmas tree, or sapin de Noël , has roots in 16th-century Alsace, where it was originally a symbol of the "tree of life" decorated with natural elements.

, French customs often honor the winter season through organic materials and slow-paced rituals. The Centerpiece: Le Sapin de Noël

The French holiday feast, le Réveillon , is a multi-hour celebration of seasonal, high-quality ingredients.

: Traditional ornaments include red apples, pine cones, and dried orange slices. You can even find modern artisans creating sustainable options like the Les Choses Simples Fir Forest Candle Go to product viewer dialog for this item. to bring the scent of a real forest indoors.

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 /yr

  • Web based EPANET model
  • Background maps and satellite
  • Automated Elevations
  • No limits on sizes
  • Community Support
Launch epanet-js now

ProMost popular

Advanced modeling & scenarios$950 /yr

Individual named license

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

Teams

Centralized control & collaboration
$4400/yr

Base cost

+
$600/yr

User

Everything in Pro, and:
  • Priority support
  • Self-service seat management
  • Pay by invoice
Coming soon:
  • Team storage
  • Point in time restore - 90 days
  • Sharing models
Get Teams

Have questions? or book a call.

Special access for personal and educational use

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

Personal

$100/yr

For curious minds and personal growth.

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

Education

$0/yr

Free for students and teachers.

Everything in pro, but:
  • Community support only
  • Non-commercial usage
Use your school email account

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

French Christmas Celebration Enature Better -

A French Christmas (Noël) celebration inherently leans toward nature, simplicity, and tradition, making it naturally "better" for those seeking an eco-conscious or rustic holiday. From the evergreen sapin de Noël to the symbolic bûche de Noël

Christmas in France: Traditions, Markets & Celebrations Guide french christmas celebration enature better

: While modern families may decorate earlier, old customs favored setting up the tree on Christmas Eve to preserve its freshness and magic. Gastronomy Rooted in the Earth , French customs often honor the winter season

The French Christmas tree, or sapin de Noël , has roots in 16th-century Alsace, where it was originally a symbol of the "tree of life" decorated with natural elements. You can even find modern artisans creating sustainable

, French customs often honor the winter season through organic materials and slow-paced rituals. The Centerpiece: Le Sapin de Noël

The French holiday feast, le Réveillon , is a multi-hour celebration of seasonal, high-quality ingredients.

: Traditional ornaments include red apples, pine cones, and dried orange slices. You can even find modern artisans creating sustainable options like the Les Choses Simples Fir Forest Candle Go to product viewer dialog for this item. to bring the scent of a real forest indoors.

A better future for water modeling.

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

Launch epanet-js now