Online Social Media Software Twitter

How do you find Twitter users on Mastodon?

Abstract cartoon artwork showing Twitter logo and Elephants next to a man taking a selfie.
Bring your Twitter life to Mastodon

If you’re currently swapping Tweets for Toots, then you’ve probably tried to find Twitter users on Mastodon. Currently, it’s not an exact science but we’ve got something for you to try.

What is Fedifinder?

If you’ve read our How does Mastodon work? story by David Artiss, he mentions Fedifinder as a way of finding Twitter users on Mastodon. Fedifinder has been created by Luca Hammer and is a tool which does a fantastic job of trying to combine two platforms that were never designed to be entwined.

How does Fedifinder find Twitter users?

Fedifinder looks for Mastodon usernames within the name, description, location, URL field of a Twitter profile.

Screenshot of Twitter profile showing Mastodon address

If you look at my Twitter profile, you’ll spot that I’ve added my Mastodon username. Fedifinder will look for this in the profiles and pinned tweets of your Twitter followings. Without this Mastodon information, Fedifinder won’t be able to find Twitter followers on Mastodon.

To make the magic happen, visit and select Authorize to extract handles.

Screenshot showing Twitter authorisation for fedifinder

Fedifinder requires read-only access to your Twitter account (we’ll show you how to revoke it later). Once granted, it will offer to whip through your Twitter account, looking for the Mastodon information. Fedifinder can search for followers, followings and lists. Click one of the options and the process starts.

Screenshot showing Fedifinder search results for @bazzacollins Twitter account

Fedifinder will display a long list of Mastodon accounts, each has a clickable blue button which give you a follow option. If it is more convenient, Fedifinder also has an option to export everything it finds to a .CSV file (or spreadsheet). This can be imported directly into your Mastodon account via a browser.

Screenshot showing Mastodon import options.

To import the .CSV file into Mastodon, go to Preferences > Import and export > Import. Ensure that merge is selected, as overwrite will replace your current Mastodon data.

How to revoke Fedifinder’s access to Twitter?

Screenshot showing Twitter connected apps options

The easiest way is to log in to your account at From the left menu, select More then Settings and Support then Settings and Privacy. Next, choose Security and account access then App and sessions and finally, Connected Apps. Fedifinder is listed as Glitch Experiments, so select it and click, Revoke app permissions.

You don’t have to revoke the access. This may be more convenient if you want to run Fedifinder again in a few weeks to find other Twitter followers on Mastodon. If you do revoke, Fedifinder will ask for permissions the next time you run it.

Something to think about

Each Instance is self-funding. Some may have sponsors, some may not. Visit the website of your instance to find out how you can support it.

Luca Hammer has requested that if we wish to express our gratitude for Fedifinder, then donating to the admins of the Mastodon instances that we use or an organisation that fights for civil liberties would be much appreciated.

How does Mastodon work?

About the author

Lee Grant

I can normally be found attacking things with screwdrivers in my small computer repair business or writing a column for PC Pro magazine.

I am also trying to solve a mystery involving David Bowie.

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