A bookmarklet for translating web pages using DeepL.

translate_by_deepl.js

javascript: (function () {
var API_KEY = '<your_deel_api_key>';
var DEEPL_TRANSLATE_EP = 'https://api.deepl.com/v2/translate';
var TARGET_LANBG = 'JA';
var bodyHtml = document.getElementsByTagName('body')[0].innerHTML;
var params = {
  'auth_key': API_KEY,
  'text': bodyHtml,
  'target_lang': TARGET_LANBG,
  'tag_handling': 'xml'
};
var data = new URLSearchParams();
Object.keys(params).forEach(key => data.append(key, params[key]));

fetch(DEEPL_TRANSLATE_EP, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/x-www-form-urlencoded; utf-8'
    },
    body: data
}).then(res => res.json()).then(resData => {
  console.log(resData);
  document.getElementsByTagName('body')[0].innerHTML = resData.translations[0].text;
});
})()