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.


Ensures your business remains legally compliant with software copyright laws. Key Features of Version 7.6 (and later)
Fast loading of RAW, JPEG, PNG, and TIFF files.
The corporate version can often be deployed as a "Portable" app, meaning it runs from a USB drive without installation. Security Warning
Searching for "FastStone Image Viewer 7.6 Corporate Full Version" often leads to sites offering "pre-activated" or "repack" installers. These files frequently contain designed to compromise corporate networks. For a professional environment, it is strongly recommended to download the official installer directly from FastStone.org and apply a legitimate corporate registration key.
Avoids the malware and trojans often bundled with "full version" cracks or keygens found on third-party sites.
A unique interface where moving the mouse to the screen edges reveals EXIF data, thumbnails, and editing tools.
FastStone Image Viewer is for personal and educational use. However, for commercial or corporate use, you must purchase a life-time license.
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.
Ensures your business remains legally compliant with software copyright laws. Key Features of Version 7.6 (and later)
Fast loading of RAW, JPEG, PNG, and TIFF files.
The corporate version can often be deployed as a "Portable" app, meaning it runs from a USB drive without installation. Security Warning
Searching for "FastStone Image Viewer 7.6 Corporate Full Version" often leads to sites offering "pre-activated" or "repack" installers. These files frequently contain designed to compromise corporate networks. For a professional environment, it is strongly recommended to download the official installer directly from FastStone.org and apply a legitimate corporate registration key.
Avoids the malware and trojans often bundled with "full version" cracks or keygens found on third-party sites.
A unique interface where moving the mouse to the screen edges reveals EXIF data, thumbnails, and editing tools.
FastStone Image Viewer is for personal and educational use. However, for commercial or corporate use, you must purchase a life-time license.
Simple, quick, and useful right out of the gate — designed to open-and-go.
Launch epanet-js now