Finding Twitter User IDs

finding_twitter_user_id.md

Finding Twitter User IDs

User accounts on Twitter are commonly identified by screen name, which may be changed by operators when they take over an account, or have been sitting on an old account for a long time and want to transition it into malicious use.

User IDs, however, are permanent. There are several services out there that will try to find them for you but it seems like a bad idea to me, since you're alerting them to the fact that there's something interesting about this account. There's also plenty of bad advice that uses many long-since-abandoned Twitter API endpoints.

As of this writing (2018-02-18) you can view source and search for /profile_banners/, which will show something like this:

.enhanced-mini-profile .mini-profile .profile-summary {
  background-image: url(https://pbs.twimg.com/profile_banners/2622731/1401943819/mobile);
}

The number after profile_banners/ is the account's Twitter user ID, which won't change if the account's screen name is changed. Here, 2622731 is my personal Twitter ID. (Expect to see much later numbers for more recent accounts; mine is quite old.)

Deleted Accounts?

If someone has just deleted their account it's often possible to find it in Google's most recent cache. Try searching for this:

twitter thatRecentlyDeletedUserName

Click the little down-arrow in the green URL, just below the blue headline, and then choose Cached. If it works, you'll see a page from http://webcache.googleusercontent.com/ with a View Source link somewhere near the top. Search as shown above.

ID to User Name?

To translate an ID to the current user name, visit the Intents url. Here's mine:

https://twitter.com/intent/user?user_id=2622731

This will show my current Twitter user name, which is @kentbrew. You should follow me, of course. :)

Another url for ID to user name can be https://twitter.com/i/user/2622731.

The profile_banners bit only shows up in the Inspect menu in the browser, not in the actual page source, meaning you have to dig through Dev Tools manually every time.
No way to script a solution.

Haven't looked at this in a while. It looks like one of document.scripts has a type of application/ld+json. If you try this on a profile page:

id = JSON.parse(
document.evaluate(
    '//script[@type="application/ld+json"]', 
    document.lastChild, 
    null,
    XPathResult.ANY_TYPE, null).iterateNext().textContent
).author.identifier;

... you ought to get the user ID.

I wasn't sure how to translate that snippet to Powershell.
I've also tried Twitter's api, all to no avail (apparently it's broken right now).

What did end up working though was gallery-dl:

$Url = $args[0]
$Output = gallery-dl --list-keywords $Url | Select-String -Pattern "user\['id'\]" -Context 1
$Output[0].Context.DisplayPostContext

It's possible to get your id from your cookies!
X/Twitter has a cookie field called "twid" which is always u%3D<TWITTERID>, i.e. the URL formatted version of u=<TWITTERID>.
I found something like the following when executed in the console can quickly return your id

((await window.cookieStore.get("twid")).value).slice(4)