This is a little redundant on Mastodon, but it could be people are creating Mastodon accounts ab initio. So here are #oldtweets about it:
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I finally tested Debirdify and Fedifinder on my account.
Fedifinder is very no-frills. Log in to your Twitter account, finds Mastodon accounts, downloads a fedifinder_accounts.csv file, and it's done. You log it out of your Twitter account as the last step.
3:27 PM · Dec 13, 2022
#oldtweets (with grammatical error fixed)
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Debirdify is a lot more informative, although what you'd do with that information is the question. Nonetheless, it also downloads a file, accounts_following.csv. It also provides a list of maybe-Mastodon accounts that it wasn't sure of (the URL-style format, I suspect).
3:29 PM · Dec 13, 2022
#oldtweets
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Anyway, Debirdify does provide a couple of cool graphs, but....
3:36 PM · Dec 13, 2022
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Fedifinder's CSV file is 352 rows (not counting header), while Debirdify's is 312 rows. I suspect Fedifinder is figuring out the accounts Debirdify is unsure of.
3:40 PM · Dec 13, 2022
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Either way, I already added ~210 accounts manually (plus a few that are Mastodon-only) earlier.
So the advantage isn't the uploading, it's that these tools find the 300+ accounts in my 1800+ Twitter Following list. Which was a real pain to look through.
3:44 PM · Dec 13, 2022
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There is also Twitodon. But one of its steps is to log onto your Mastodon account, a step that can't be skipped.
Maybe it provides the option of direct transfer? I don't know. I recognize the necessity of logging into Twitter. No such need exists for Mastodon, so I passed.
3:49 PM · Dec 13, 2022
John M. Gamble