Leetspeak (1337) Converter
Text
Turn ordinary text into leetspeak — the classic hacker and gamer style where letters become look-alike numbers (e becomes 3, o becomes 0). Pick a basic or advanced substitution set, or switch to decode mode to turn 1337 numbers back into letters. Everything runs locally in your browser — nothing is uploaded.
How to use
- Choose encode (text to leet) or decode (leet to text).
- For encoding, pick the basic or advanced substitution level.
- Type or paste your text and copy the result.
Frequently asked questions
- What is the difference between basic and advanced?
- Basic swaps a, e, i, o, s and t for 4, 3, 1, 0, 5 and 7. Advanced also swaps b, g and z for 8, 6 and 2 for a heavier 1337 look.
- Is decoding always exact?
- Decoding maps the leet numbers back to letters, which restores the common cases. Since leetspeak is lossy and stylized, unusual substitutions may not round-trip perfectly.
- Are spaces and punctuation kept?
- Yes. Only letters (when encoding) or digits (when decoding) are converted; spaces, punctuation and other characters pass through unchanged.
- Is my text sent anywhere?
- No. The conversion happens entirely in your browser; nothing is uploaded.
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