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.


2 00:00:05,300 --> 00:00:09,800 Woman: Then why are you here?
I’m not sure what format you currently have—assumption: you want a cleaner, Eng-sub (.srt) version of a 2:01:36-length video (timestamp 02:01:36) named "fjin046engsub" and want an “interesting feature” added (e.g., scene summaries, speaker tags, or clickable timestamps). I’ll pick reasonable defaults and produce a sample improved SRT segment plus a feature: short per-scene summary lines inserted as comments between subtitle blocks.
4 00:00:14,600 --> 00:00:20,000 Narrator: A wind picks up as the truth begins to surface.
If you want a different feature, tell me which (scene summaries, speaker IDs, emotion tags, chapter markers, karaoke timing, compressed single-line subs, or WebVTT with chapters). Below is a 30-second example (times in HH:MM:SS,mmm). Replace with full transcript to convert entire file.
1 00:00:00,000 --> 00:00:05,200 [Scene summary: Night market, tense introduction] Man: We didn’t expect anyone to show up tonight.
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.
2 00:00:05,300 --> 00:00:09,800 Woman: Then why are you here?
I’m not sure what format you currently have—assumption: you want a cleaner, Eng-sub (.srt) version of a 2:01:36-length video (timestamp 02:01:36) named "fjin046engsub" and want an “interesting feature” added (e.g., scene summaries, speaker tags, or clickable timestamps). I’ll pick reasonable defaults and produce a sample improved SRT segment plus a feature: short per-scene summary lines inserted as comments between subtitle blocks.
4 00:00:14,600 --> 00:00:20,000 Narrator: A wind picks up as the truth begins to surface.
If you want a different feature, tell me which (scene summaries, speaker IDs, emotion tags, chapter markers, karaoke timing, compressed single-line subs, or WebVTT with chapters). Below is a 30-second example (times in HH:MM:SS,mmm). Replace with full transcript to convert entire file.
1 00:00:00,000 --> 00:00:05,200 [Scene summary: Night market, tense introduction] Man: We didn’t expect anyone to show up tonight.
Simple, quick, and useful right out of the gate — designed to open-and-go.
Launch epanet-js now