Leetspeak Translator
Free leetspeak translator — convert any text into 1337 speak using classic letter-to-number substitutions. Copy and paste anywhere.
Leetspeak has no single official standard — Classic uses the most widely recognised substitutions.
About Leetspeak Translator
The Leetspeak Translator converts ordinary text into 1337 speak — the letter-to-number substitution style that grew out of 1980s and 90s hacker and gaming culture, where “elite” became “1337” and vowels turned into visually similar digits.
Since leetspeak was never a single formal standard, this tool offers three intensity levels instead of one fixed conversion. Light swaps only the most recognisable, still-readable characters (a, e, i, o). Classic adds the substitutions most people associate with the style (s, t, g, l) for the full 1337 look. Extreme piles on symbol combinations for maximum visual noise — readable mostly to people already used to decoding it.
Type or paste any text, pick an intensity, and copy the result straight to your clipboard. Everything runs in your browser — no server calls, no signup, no watermark.
Frequently asked questions
Leetspeak (or 1337 speak) is an informal internet writing style that swaps letters for visually similar numbers or symbols — like 'leet' becoming '1337'. It grew out of early online gaming and hacker culture in the 1980s and 90s.
No. Leetspeak has never had a single formal specification — different communities use different substitutions. This tool's Classic intensity uses the most widely recognised set (a→4, e→3, i→1, o→0, s→5, t→7).
Light substitutes only the most common, still-readable swaps (a, e, i, o). Classic adds s, t, g, and l for the recognisable 1337 look. Extreme piles on symbol combinations (like |3 for b and \/ for v) for maximum visual noise.
Light and Classic stay readable to anyone familiar with the style. Extreme is intentionally harder to read — it's for novelty, not clarity.