Turn text into 1337 speak

Leetspeak (also written "1337" or "leet") is an alternative way of writing where letters are replaced by numbers and symbols that look similar — for example A becomes 4 and E becomes 3. It originated in early internet and hacker culture.

Light only swaps the most common letters (a, e, i, o, t…) so the text stays readable. Medium adds more replacements, and Hardcore uses multi-character symbol combinations for a heavily encoded look.

UwU turns text into the cutesy internet speak (r and l become w, plus the odd “nya” and a face at the end of a sentence). Zalgo stacks accent marks above and below every letter for the “glitch” look – the strength slider goes from a light shimmer (1) to total chaos (5). Upside down swaps each character for a look-alike that stands on its head and reverses the order, so the text reads correctly when you turn the screen around. Emoji replaces around 250 everyday words with the matching emoji (dog becomes 🐶, pizza becomes 🍕) – it knows English and German words.

No. The conversion runs entirely in your browser. Nothing you type is sent to a server or saved.

Yes. Switch on “Translate back” and paste the text, or press the swap button between the two fields. Zalgo, upside-down text and emojis come back cleanly. Leetspeak is a best guess: several letters share one symbol (a 1 can be i or l), capital letters are lost and plain numbers are left alone. Only UwU has no way back, because r and l both became w.