Text to Leetspeak

Transform your messages into 1337 5p34k with advanced character mapping

Input Message

L33t 0utput

0 Chars Mutated

Elite Substitution Style

Write in 1337 5p34k with one click

Leetspeak, also written 1337 or l33t, replaces letters with numbers and symbols that look similar. It began in early online communities and is still used for gamertags, usernames, jokes and puzzle text. This converter applies a fixed substitution table to whatever you type, so you can turn a normal sentence into leet without working out each swap by hand.

Converting your text

Type or paste your message into the Input Message box. Example loads a sample sentence, Paste takes text from your clipboard and Clear empties the field.
Press the 3nc0d3 t0 L33t button.
The converted text appears under L33t 0utput, along with a Chars Mutated count.
Press Copy Result to copy the output.

The substitution table

Lowercase letters are all mapped. Simple swaps include a to 4, b to 8, e to 3, g to 6, i to 1, o to 0, s to 5, t to 7 and z to 2. Others are drawn from several characters: d becomes a bar and a closing bracket, m becomes a bar, V and a bar, and w becomes two slashes shaped like a W. Some letters use a symbol, such as c as an opening bracket and h as a hash sign.

Uppercase letters are only partly covered. A, B, E, G, I, L, O, S, T and Z are converted, but the other capitals, such as C, D, H, M, N, R and W, are left as typed. If you want a fully converted result, type your text in lowercase first.

Ideas for using it

Creating a distinctive username or gamertag from your name.
Making a hacker-themed message for a puzzle, invitation or party.
Adding a retro internet flavour to a social post or meme.
Producing test text for a decoder or a forum filter.

Points to keep in mind

Leet is meant to be read by people, so overuse hurts legibility; convert short phrases, not paragraphs. Because many symbols are made from several characters, the output is often much longer than the input, which may matter for sites with a character limit on names. Some sites reject certain symbols in usernames, so check what is allowed before using the result. The substitutions are one fixed style, labelled Elite in the results panel, and there are no options for lighter or heavier leet. To turn leet back into English, use the Leetspeak to Text tool, keeping in mind that the reverse is ambiguous.

Related Tools

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Frequently Asked Questions

What does the Chars Mutated number mean?

It counts how many characters in your input were replaced by a leet substitution. Letters without a mapping, spaces, digits and punctuation are not counted. It gives a quick sense of how heavily the text was transformed.

Why were some capital letters not converted?

The table maps every lowercase letter but only ten capitals: A, B, E, G, I, L, O, S, T and Z. Other capitals such as C, D, H, M, N and R are left unchanged. Type in lowercase if you want every letter converted.

Can I control how much leetspeak is applied?

No. The page uses one fixed substitution style with no intensity setting. Every mapped character is replaced. If you want a lighter effect, convert the text and then manually restore some letters in the output.

Why is the output longer than my original text?

Several letters are replaced by multi-character shapes. For example m becomes three characters and w becomes four. A message full of those letters can expand considerably, which is worth remembering when a site limits username or bio length.

Can the result be converted back to normal text?

Partly. The Leetspeak to Text tool reverses most substitutions, but leet is ambiguous, since one symbol can stand for several letters, and case information is lost. Expect a readable result that may need small manual fixes.