store (compressed) text input on a static page in the url

make-url-from-zipped-string.js

import LZUTF8 from 'lzutf8'

const config = {
  // scrape...
}

// on config text box input
const configUrlParam = LZUTF8.compress(config, { outputEncoding: "Base64" })
history.replaceState(null, '', "?config=" + configUrlParam)

// on page load
const url = new URL(window.location)
const configBase64 = url.searchParams.get('config')
const config = LZUTF8.decompress(output, { inputEncoding: "Base64" })