How the leetspeak conversion works
Leetspeak is an old internet habit of writing letters as the digits and symbols they resemble. The name itself comes from writing elite as 1337. People use it to dress up a gaming handle, to imitate the look of early message boards, or simply because the result is fun to read.
There is no official standard for the style, and different communities substitute different characters, so this tool uses its own three-level table and prints that exact table on the page below the result. The light level touches only the six letters that stay readable as digits, medium widens the digit swaps, and heavy brings in symbol combinations that look striking but are hard to read. Check the table and pick the level that suits what you are writing.
Letters outside the table, punctuation and emoji are left exactly as they are, and so are Hangul and other non-Latin scripts, which have no lookalike digits to map onto. The result reports how many characters were replaced and how many were passed through untouched. One more thing worth knowing: the conversion only runs one way. A 1 in the output could have come from an i or an l, so the original cannot be recovered reliably, and that is why no reverse mode is offered here. Keep a copy of your original text if you will need it later.
Frequently asked questions
No. From the medium level up, both i and l become 1, so the original letter cannot be recovered. That is why no reverse mode exists here; keep your original text separately.
It passes through unchanged, because those scripts have no lookalike digits to substitute. The processing notes report how many characters were left untouched.