Francis Karl Alter (German: Franz Karl Alter) (1749–1804), a Jesuit, born in Silesia, and professor of Greek at Vienna, was an editor of the Greek text of the New Testament. His edition was different from those of Mill, Wettstein, and Griesbach, because he used only the manuscripts housed at the Imperial Library at Vienna. It was the first edition of the Greek New Testament that contained evidence from Slavic manuscripts.
Alter used twelve manuscripts of the Gospels (U, 3, 76, 77, 108, 123, 124, 125, 219, 220, 224, 225), six of the Acts (3, 43a, 63a, 64a, 66a, 67a), seven of the Pauline epistles (3, 49p, 67p, 68p, 69p, 70p, 71p), three of the Apocalypse (34r, 35r, 36r), and two Evangelistaria (ℓ 45, ℓ 46). He also used readings from the Coptic Bohairic version (edited by David Wilkins in 1716), four Slavonic codices and one Old Latin codex (i). Most of these Vienna codices were also examined by Andrew Birch.