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Leetspeak Converter: Text to 1337 Speak and Back

This free leetspeak converter swaps letters for look-alike numbers and symbols, so elite becomes 3l173. Choose a basic or an advanced style, and decode simple leet back to normal text.

By Debmedia Technologies LLP · Kolkata, India · Updated

What Is It and When Do You Need It?

Leetspeak writes words with characters that look like letters. It started in bulletin boards and games, and survives as a joke, a username style and a way to dodge word filters.

Choose a style and convert your text.

How to Use This Tool

  1. Type your text.
  2. Choose text to leet or back.
  3. Choose basic or advanced style.
  4. Press Run and copy the result.

How the Calculation Works

Each letter is looked up in a replacement table. The basic style replaces A, E, I, O, S and T with 4, 3, 1, 0, 5 and 7. The advanced style adds symbols such as @ for A, 8 for B, ( for C, |) for D and so on. Decoding reverses the basic table.

Worked Example

elite hacker becomes 3l173 h4ck3r in basic style.

Common Uses

  • Gaming names and fun.
  • Social posts.
  • Teaching text substitution.
  • Word-filter tests.

Tips and Common Mistakes

  • Do not use leet substitutions to make passwords.
  • Decoding may need small manual fixes.
  • Advanced style is harder to read.
  • If you are using leetspeak to get past a word filter, remember that many sites now normalise these substitutions before they check text.

Next, you may need the NATO alphabet, Pig Latin translator, Caesar cipher, Braille translator.

Everything runs in your browser. Nothing you type is uploaded, stored or sent to any outside service.

Frequently Asked Questions

An informal writing style from early online gaming and hacker culture in which letters are replaced by numbers or symbols that look like them. The word leet comes from elite.
No. Many variants exist. The basic style changes six letters, and the advanced style uses more symbols.
Simple leet, yes, but some symbols stand for several letters, such as 1 for I or L, so the result may need a manual check.
No. Attackers know leet substitutions, so p4ssw0rd is not a strong password.

Disclaimer: results are calculated in your browser from the numbers you enter. Check important results before you rely on them for money, health, safety or legal decisions.