Leetspeak Converter
Turn text into 1337 and back again.
How to use
- 1 Choose a direction: text to leetspeak, or leetspeak back to text.
- 2 When encoding, pick the basic or heavy intensity.
- 3 Type or paste your text into the input box.
- 4 Read the converted result and copy it.
About Leetspeak Converter
The Leetspeak Converter rewrites ordinary text in "1337" — the playful internet alphabet that swaps letters for the numbers and symbols that resemble them, like turning "elite" into "3l173".
It works in both directions: encode plain text into leetspeak, or paste leetspeak and decode it back to readable letters.
Two intensities let you dial in the look.
The basic level uses the classic, still-legible substitutions (a→4, e→3, i→1, o→0, s→5, t→7), which is perfect for usernames, gamer tags and captions that should remain recognisable.
The heavy level layers in a denser symbol mapping (b→8, g→9, l→|, z→2 and more) for that full old-school hacker aesthetic.
Any character without a mapping — punctuation, spaces, emoji — simply passes through untouched, so formatting survives the conversion.
Decoding is best-effort by design: it reverses the well-known leet tokens back to letters, though it cannot recover detail that was never encoded in the first place.
Everything runs locally in your browser with no uploads, no tracking and no network calls, so it is fast, private and works offline.
Use it for fun handles, retro styling, puzzles, or just to see your message in glorious 1337.
FAQ
What is the difference between basic and heavy intensity?
Basic uses the common, readable swaps (a→4, e→3, i→1, o→0, s→5, t→7). Heavy adds a denser symbol set such as b→8, g→9 and l→|, for a more extreme look.
Can it always decode leetspeak perfectly?
Decoding restores the well-known leet tokens to letters, but it is best-effort: characters that were never part of the mapping pass through unchanged, so unusual styles may not fully revert.