Console script to convert SitePoint table of mimetypes to JSON string - https://www.sitepoint.com/mime-types-complete-list

script.js

var data = []
document.querySelectorAll('tbody tr').forEach(el => {
  var td = el.querySelectorAll('td')

  data.push({
    'suffix': td[0].innerHTML.replace(/\./, ''),
    'contentType': td[1].innerHTML
  })
})

var json = JSON.stringify({
  'mimeTypes': data
}, null, 2)

document.write(`<pre>${json}</pre>`)