Clear your Twitter Timeline

detweeter.js

// 1) Automatically scroll to the very bottom of your timeline. This script will scroll as far as it can on any given page.
// If, after five seconds, it can't scroll any further down the page, it will alert you that it's finished.
// However, this may just mean that your timeline is slow to load. Make sure you're actually at the bottom of your timeline before proceeding to step 2
var interval;
var body = document.body;
var bottom;
var current;
interval = setInterval(function() {
    bottom = body.scrollHeight; // Height
    current = window.innerHeight + document.documentElement.scrollTop;
    window.scrollTo(0, document.body.scrollHeight);
    console.log('Started scrolling!');
    if (bottom - current <= 10) {
        clearInterval(interval);
        alert('Finished scrolling!');
    }
}, 5000);

// 1a) If you need to STOP the scrolling process:
clearInterval(interval);

// 2) Unclick all retweeeted tweets.
var retweets = document.querySelectorAll(".retweeted .js-actionRetweet");
Array.prototype.forEach.call(retweets, child => {
    child.click();
});

// 3) Delete each original tweet, and click the double-confirm modal that appears.
var originalTweets = document.querySelectorAll(".js-original-tweet .js-actionDelete .dropdown-link");
Array.prototype.forEach.call(originalTweets, child => {
    child.click();
    document.querySelector(".modal-container .delete-action").click();
});