TT
Text Toolkit

Leet Speak (1337) Converter

Translate normal text into Leet Speak (1337), an alternative alphabet for the English language used primarily on the Internet. Originally developed by hacker communities in the 1980s to bypass text filters on BBS (Bulletin Board Systems), it replaces letters with numbers or special characters that resemble them (e.g., 'E' becomes '3', 'A' becomes '4'). Today, it is widely used in gaming culture and by users seeking unique usernames.

Cipher

0 characters

Cipher Settings

Processed Text

0 characters

Cipher Settings

Leetspeak Generator (1337)

Replaces letters with similar-looking numbers and symbols

Character Mapping:

  • A→4, E→3, I→1, O→0, S→5, T→7, L→1, G→9
  • Case-insensitive (input converted to lowercase)
  • Common in gaming and hacker culture
  • Example: "HELLO" → "H3110", "LEET" → "1337"

Who Uses This Tool

  • • Gamers creating unique handles or Clan tags
  • • Forum users bypassing basic keyword filters
  • • Sysadmins generating memorable complex passwords
  • • Retro computing enthusiasts
  • • Designers looking for 'hacker aesthetic' text

Key Features

  • ✓ Converts standard text to 'Basic' or 'Advanced' Leet
  • ✓ Characters mapped to numbers/symbols (A->4, E->3, T->7)
  • ✓ Instant conversion as you type
  • ✓ One-click copy functionality
  • ✓ Preserves original sentence structure
  • ✓ Fun 'hacker' style output

Frequently Asked Questions

What is '1337'?

1337 is the numeric representation of the word LEET (Elite). It originated from 'elite' exchange access on early bulletin board systems, denoting users with special privileges.

Can I use Leet Speak for passwords?

Using basic Leet Speak (reading 'password' as 'p455w0rd') is generally NOT secure against modern password crackers, which account for these common substitutions. It is better to use truly random characters.

Is this reversible?

Not reliably. Because multiple letters might map to the same symbol (or symbols can be interpreted differently), converting back to plain English is often ambiguous without human interpretation.

Related Tools

Binary Encoder

Convert any text to binary (010101) code instantly. Visualize how computers store ASCII and Unicode text. Free online translator.

Use Tool

Case Converter

Convert text case online instantly. Switch between Uppercase, Lowercase, Title Case, camelCase, and PascalCase. Free text formatting tool.

Use Tool

Caesar Cipher

Decrypt and encrypt messages using the classic Caesar Cipher. A simple shift substitution technique used by Julius Caesar. Learn cryptographic history while securing your text.

Use Tool