Working fully client-sided in the browser.
Online build available on https://ignis05.github.io/baro-save-editor/
For offline usage PWA feature is available:

Made with Vue 3, Vuetify and Vite.
Requires having node.js version ^16.6.1 installed.
npm install - installs node dependencies
npm run dev- starts development servernpm run build- makes production build ready for hosting in ./distnpm run preview- starts local server that previews production build