Search using a Mastodon instance
Go to your favorite Mastodon instance and search for the Twitter handle of the account you want to find followed by @tooter.cf.
For instance: @firstname.lastname@example.org
If that account is on Mastodon you should see their profile in the search results.
Search using this website
While not as fun as the previous method, you can also type a Twitter username here and we'll redirect you to the corresponding Mastodon profile.
How does it work?
It scans the profile of the Twitter account you provide looking for Mastodon handles in its name, description, location, website and pinned tweet. It uses nitter to obtain this information.
Alternatives to Tooter
This app is designed to be used mainly inside existing Mastodon instances, so you can quickly type @tooter.cf and not have to leave Mastodon to find a Twitter account.
However, sometimes you need to find multiple users in batch (for example, when migrating an entire list of accounts to follow). These tools are way better for that: