Leet Speak Converter

About this tool

This tool converts plain text into simple leet speak (1337). It swaps six letters, in uppercase or lowercase, for look-alike digits: a becomes 4, e becomes 3, i becomes 1, o becomes 0, s becomes 5 and t becomes 7. All other characters stay as they are. The conversion works in one direction and cannot turn leet back into normal text. It is meant for fun and usernames and does not make a password secure. It runs in your browser as you type.

How to use it

1. Type or paste your text.
2. Read the 1337 version in the output.
3. Press Copy to use it.

Example

Elite hacker

3l173 h4ck3r

Common problems

Leet is not a safe way to make a password

Swapping letters for numbers is well known and easy to guess. Use a password generator instead.

Cannot convert back

The tool only encodes. Case is also lost, since uppercase and lowercase both become the same digit.

Other letters are untouched

Only six letters are replaced, so the result is a light version of leet.