French Baguette Tools
Leetspeak Translator
Three levels, from a simple vowel swap to full character substitution.
The leetspeak translator is a free tool that runs entirely in your browser, with no data ever sent to a server. Write in leetspeak, or read text already written that way.
Where leetspeak comes from
Leetspeak, or 1337, appeared on 1980s bulletin boards, where swapping letters for digits slipped past automatic filters. The habit survived as a writing game, in handles and gaming communities.
The three levels
The light level only applies the universal swaps: a becomes 4, e becomes 3, o becomes 0. The medium level adds letters that resemble a digit, such as s to 5 or t to 7. The full level goes as far as multi-character shapes, where m becomes |\/|: unreadable at a glance, which is sometimes the point.
What this tool does not do
Leetspeak is not encryption: it protects nothing and reads back with the naked eye. At the full level, converting back stays approximate, since several letters share the same signs.
Frequently asked questions
Does leetspeak protect a password?
No, quite the opposite. Password cracking software has applied these swaps for decades: “P4ssw0rd” falls as fast as “Password”. Use a long passphrase and a password manager instead.
Why is the reverse translation imperfect?
Because the mapping is not reversible: 1 stands for both i and l, 5 for s and sometimes S. The tool keeps the most frequent reading, so a word can come back slightly different.
Is my data sent to a server?
No: the text you type or paste is processed entirely in your browser, on your device. It is never transmitted to a server.
Do I need an account or an install?
No: the tool works directly on this page, with no sign-up and no installation.