Leetspeak Converter
Convert text to leetspeak (1337) and back, in your browser.
Speak 1337
Leetspeak replaces letters with look-alike numbers and symbols, a playful style born in early internet culture. This converter encodes ordinary text into leet and decodes it back using the common substitutions.
“elite hacker” becomes “31173 h4ck3r”, swapping e for 3, l for 1, i for 1, and so on. The reverse mode maps those back to letters for a readable decode.
Playful and private
It applies a standard substitution table in your browser, so it works offline and nothing you type is uploaded.
Frequently Asked Questions
What is leetspeak?
An internet writing style that swaps letters for similar-looking numbers and symbols, so “elite” becomes “31337”. It began in early online communities.
Can it decode leet?
Yes — the reverse mode maps the common substitutions back to letters, though some ambiguous cases may need a human eye.
Is there one standard?
No, leet has many variants. This tool uses the most common substitutions for a readable result.
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