Turn plain English into hacker-style 1337 text — or decode it back. Pick a style from basic to ultra and watch every letter transform instantly.
Leetspeak grew out of early hacker culture and BBS systems in the 1980s, where users swapped letters for visually similar digits and symbols (A→4, E→3, S→5, T→7). It was used for fun, to evade simple text filters, and to show in-group status. Today it still appears in gamer tags, usernames and captchas for extra flair.