Bookmarklet to scrape a list of titles on Justwatch into a CSV that can be imported into Letterboxd.

justwatch2letterboxd.js

(function() {
	// https://www.justwatch.com/us/lists/my-lists?content_type=movie&inner_tab=seenlist&list_layout=card
	// https://www.justwatch.com/us/lists/my-lists?content_type=movie&inner_tab=watchlist&list_layout=card
	// https://www.justwatch.com/us/lists/my-lists?content_type=movie&inner_tab=likelist&list_layout=card
	// https://letterboxd.com/about/importing-data/
	const total = parseInt(document.querySelector('.titles-count').textContent, 10)
	const titles = document.getElementsByClassName('title-card-heading')
	console.assert(titles.length === total, 'please scroll down until all titles are loaded')
	return Array.prototype.reduce.call(
		titles,
		(csv, e) => `${csv}"${e.firstChild.wholeText.trim().replace('"', '\\"')}",${e.lastChild.firstChild.wholeText.match(/\d{4}/)[0]}\n`,
		'Title,Year\n')
})()