Leet Speak (or 1337) is a writing system that substitutes standard letters with numbers or symbols that look similar — for example, E becomes 3, A becomes 4, and O becomes 0. It originated in early internet and hacker culture.

How do I convert text to Leet Speak?

Type or paste your text in the input panel. The 1337 version appears instantly. Click 'Copy Output' to copy the result or 'Load Example' to try a sample.

Is the Leet Speak generator free?

Yes, completely free. The conversion runs entirely in your browser — no data is sent to any server, and no signup is required.

Leet Speak Generator

Convert text to Leet Speak (1337) instantly online. Replaces letters with look-alike numbers for the classic hacker aesthetic. Free — no signup, runs entirely in your browser.

Normal Text

1337 Speak

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Leet Speak Substitutions

A→4

B→8

E→3

G→9

I→1

L→1

O→0

S→5

T→7

All other characters, spaces, numbers, and punctuation are left unchanged.