Leet speak (1337 speak) is an internet slang that replaces standard letters with similar-looking numbers or symbols: A→4, E→3, L→1, O→0, S→5, T→7, etc. It originated in early internet and hacker culture.

What are the substitution levels?

Basic level substitutes only the most common characters (A, E, O, I, S). Standard adds more. Full leet substitutes nearly every letter with numbers or symbols.

Leet Speak Converter

Converts text to leet speak (1337 5p34k) by substituting letters with visually similar numbers and symbols. Choose from basic (E→3, A→4, O→0), standard (adds more substitutions), or full leet mode for maximum substitution density. Popular in gaming and internet culture.

Input text

Leet level

basicstandardfull

1337 result

Type your text and choose your leet level to generate 1337 speak output.

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