About leetspeak
This tool converts text to leetspeak (1337) and back. Leetspeak replaces letters with similar-looking numbers and symbols. Choose a light or heavy style, or convert leet back to plain text. It runs in your browser.
How Leetspeak works
How to use it
- Type your text.
- Choose light, heavy, or leet → text.
- Copy the result.
How it works
Light mode swaps the common letters (a→4, e→3, i→1, o→0, t→7, s→5) so it stays readable. Heavy mode uses fuller symbol substitutions. The reverse mode maps common leet characters back to letters.
Common uses
- Convert text to leetspeak
- Make a leet username
- Decode leet text
- Have fun with 1337 speak
- Style gaming tags
- Create quirky messages
- Learn leet substitutions
- Generate playful text
Frequently asked questions
What is leetspeak?
A playful style that swaps letters for look-alike numbers and symbols.
What is the difference between light and heavy?
Light swaps a few common letters; heavy uses fuller symbol substitutions.
Can it convert back?
Yes — leet → text reverses common substitutions.
Is my text uploaded?
No — it converts in your browser.
Why is reverse not perfect?
Leet is lossy, so some characters map to more than one letter.
Is it free?
Yes — completely free with no sign-up.