Downloads subtitle from Hulu.com as SRT format
// ==UserScript==
// @name Hulu.com Subtitle Downloader
// @namespace https://www.hulu.com
// @version 1.0.5
// @description Downloads subtitle from Hulu.com as SRT format
// @author subdiox
// @match https://www.hulu.com/*
// @require https://code.jquery.com/jquery-3.7.1.slim.min.js
// @require https://update.greasyfork.org/scripts/502635/1422102/waitForKeyElements-CoeJoder-fork.js
// @grant GM_xmlhttpRequest
// @copyright 2025, subdiox
// @license MIT
// ==/UserScript==
waitForKeyElements('.PlayerSettingsGroup', pageDidLoad);
function pageDidLoad(jNode) {
jNode.appendChild(createDownloadButton());
}
function createDownloadButton() {
const button = document.createElement('div');
button.id = 'download-button';
button.className = 'PlayerButton PlayerControlsButton';
button.setAttribute('aria-label', 'Download');
button.setAttribute('role', 'button');
button.setAttribute('tabindex', '0');
button.style.touchAction = 'none';
button.innerHTML =
'<svg version="1.1" id="Capa_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" ' +
'x="0px" y="0px" viewBox="0 0 29.978 29.978" style="enable-background:new 0 0 29.978 29.978;" xml:space="preserve">' +
'<path d="M25.462,19.105v6.848H4.515v-6.848H0.489v8.861c0,1.111,0.9,2.012,2.016,2.012h24.967c1.115,0,2.016-0.9,2.016-2.012 ' +
'v-8.861H25.462z" fill="#FEFEFE" fill-rule="evenodd"/>' +
'<path d="M14.62,18.426l-5.764-6.965c0,0-0.877-0.828,0.074-0.828s3.248,0,3.248,0s0-0.557,0-1.416c0-2.449,0-6.906,0-8.723 ' +
'c0,0-0.129-0.494,0.615-0.494c0.75,0,4.035,0,4.572,0c0.536,0,0.524,0.416,0.524,0.416c0,1.762,0,6.373,0,8.742 ' +
'c0,0.768,0,1.266,0,1.266s1.842,0,2.998,0c1.154,0,0.285,0.867,0.285,0.867s-4.904,6.51-5.588,7.193 ' +
'C15.092,18.979,14.62,18.426,14.62,18.426z" fill="#FEFEFE" fill-rule="evenodd"/>' +
'</svg>';
button.addEventListener('click', downloadDidClick);
return button;
}
async function downloadDidClick() {
const playbackXhr = new XMLHttpRequest();
const contentId = window.location.href.split('/').pop();
playbackXhr.open('GET', `https://discover.hulu.com/content/v5/deeplink/playback?namespace=entity&schema=1&id=${contentId}`, false);
playbackXhr.withCredentials = true;
playbackXhr.send(null);
const playbackData = JSON.parse(playbackXhr.responseText);
const captionId = playbackData.eab_id.split('::')[2];
const entityXhr = new XMLHttpRequest();
entityXhr.open('GET', `https://discover.hulu.com/content/v3/entity?device_context_id=1&language=en&referral_host=www.hulu.com&schema=4&eab_ids=${playbackData.eab_id}`, false);
entityXhr.withCredentials = true;
entityXhr.send(null);
const entityData = JSON.parse(entityXhr.responseText);
let filename = '';
const seriesName = entityData.items[0].series_name;
const seasonNumber = entityData.items[0].season;
const episodeNumber = entityData.items[0].number;
const episodeTitle = entityData.items[0].name;
if (seriesName) filename += `${seriesName} `;
if (seasonNumber) filename += `S ${seasonNumber} `;
if (episodeNumber) filename += `E ${episodeNumber} `;
if (episodeTitle) {
filename = filename
? `${filename}- ${episodeTitle}.srt`
: `${episodeTitle}.srt`;
}
if (!filename) filename = `${captionId}.srt`;
const captionsXhr = new XMLHttpRequest();
captionsXhr.open('GET', `https://www.hulu.com/captions.xml?content_id=${captionId}`, false);
captionsXhr.withCredentials = true;
captionsXhr.send(null);
const parser = new DOMParser();
const xmlDoc = parser.parseFromString(captionsXhr.responseText, 'text/xml');
const xmlElement = xmlDoc.getElementsByTagName('en')[0];
let vttUrl = `https://assetshuluimcom-a.akamaihd.net/captions_webvtt/${captionId.substr(-3)}/${captionId}_US_en_en.vtt`;
if (xmlElement) {
vttUrl = xmlElement.childNodes[0].nodeValue
.replace('captions', 'captions_webvtt')
.replace('.smi', '.vtt');
}
GM_xmlhttpRequest({
method: 'GET',
url: vttUrl,
onload: (response) => {
let cleanedVtt = '';
const vttText = response.responseText
.replace(/>/g, '>')
.replace(/</g, '<');
for (const line of vttText.split('\n')) {
if (!/WEBVTT/.test(line)) {
cleanedVtt += line.replace(
/(\d{2}:\d{2}:\d{2})\.(\d{3})\s+-->\s*(\d{2}:\d{2}:\d{2})\.(\d{3})/g,
'$1,$2 --> $3,$4'
) + '\n';
}
}
let srtContent = '';
for (const [index, rawBlock] of cleanedVtt.split('\n\n').entries()) {
const block = rawBlock.trim();
if (!block) continue;
srtContent += `${index + 1}\n${block}\n\n`;
}
downloadSRT(srtContent, filename);
}
});
}
function downloadSRT(srtText, filename) {
const blob = new Blob([srtText], { type: 'text/plain;charset=utf-8' });
const url = URL.createObjectURL(blob);
const link = document.createElement('a');
link.href = url;
link.download = filename;
document.body.appendChild(link);
link.click();
document.body.removeChild(link);
URL.revokeObjectURL(url);
}