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Leet Speak Converter
Convert plain text to leet speak (1337) or decode leet back to readable text. Classic hacker-style substitutions.
Plain text
Leet speak
Mapping: a→4, e→3, i/l→1, o→0, s→5, t→7, z→2, g→9, b→8, c→( · "elite" → "3l173"
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Frequently Asked Questions
Quick answers to common questions
What is leet speak?+
Leet speak (1337) replaces letters with similar-looking numbers and symbols. "elite" becomes "3l173".
How do I convert to leet?+
Select "To Leet Speak", paste your text, and the converted output appears instantly.
How do I decode leet?+
Select "From Leet Speak" and paste leet text. Common substitutions like 4→a, 3→e, 0→o are reversed.
What character mappings are used?+
a→4, e→3, i/l→1, o→0, s→5, t→7, z→2, g→9, b→8, c→(. Other characters stay unchanged.
Is decoding always exact?+
Some digits map to multiple letters (1 can be i or l). Decoding uses the most common mapping.
Can I copy the output?+
Yes. Use the Copy button.
Client-side only?+
Yes. No server processing.
Is this free?+
Yes.