Yes, completely free with no account needed.

Does my text leave my browser?

No. All conversion is done in JavaScript inside your browser.

Does it work on mobile?

Yes. The tool works in Safari and Chrome on iOS and Android.

Leetspeak Converter — 1337 Sp34k Text Generator

Leetspeak Converter

Convert text to 1337 sp34k — basic or advanced mode.

100% client-side · no upload

Input text

Level

Output

How to use

Paste or type your text into the input box.
Choose Basic for simple vowel substitutions or Advanced for more complete leet encoding.
Click Convert, then copy the output.

What is leetspeak?

Leetspeak (also written 1337speak or leet) is an internet slang system that replaces standard letters with numbers and symbols that resemble them visually. It originated in the 1980s hacker subculture and became popularised through online gaming communities in the 1990s and 2000s. The name itself comes from "elite" — "3l1t3" or "1337" in leet. Today it is mostly used humorously in memes, gaming usernames, and internet jokes.

Common use cases

Gaming usernames and clan tags. Meme creation and internet humour. Bypassing word filters that only block literal spellings. Retro aesthetic branding and creative writing.

常見問題

Is this tool free?: Yes, completely free with no account needed.
Does my text leave my browser?: No. All conversion is done in JavaScript inside your browser.
Does it work on mobile?: Yes. The tool works in Safari and Chrome on iOS and Android.