⚠ Plöttr needs a local web server

You opened this page directly from your filesystem (the URL starts with file://). Modern browsers block JavaScript modules from file:// for security reasons, so Plöttr's tools can't load.

Easiest fix — use the hosted version

Identical code, hosted on GitHub Pages, nothing to install:
https://evompmi.github.io/plottr

To run it 100 % offline from your clone

You need a tiny local web server. On macOS or Linux, Python 3 is already installed and one command does it:

1. Open Terminal. On macOS: press ⌘ + Space, type Terminal, hit Enter.
2. Move into the Plöttr folder you cloned. Quick way: type cd  (note the trailing space), then drag the Plöttr folder onto the Terminal window — the path fills in automatically. Press Enter.
3. Run python3 -m http.server
4. Open http://localhost:8000 in any browser. Plöttr loads there.

Leave the Terminal window open while you use Plöttr — closing it stops the local server. Ctrl + C in Terminal shuts it down cleanly.

No Python? Any static-file server works: npx serve (if you have Node.js installed), VS Code's "Live Server" extension, or simply upload the folder to any static host.