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Leetspeak Converter
Convert plain text into leetspeak and back, with three intensity levels and case preservation.
Convert to or from leet
How to use the Leetspeak Converter
- Choose whether to encode into leet or decode back to text.
- Pick an intensity level and how letter case should be handled.
- Copy the converted text with the copy button.
Features
- Three leetspeak intensity levels
- Decode leet back into plain text
- Optional case preservation
- Every substitution runs locally
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Frequently Asked Questions
Common questions about the free online leetspeak converter.
Leetspeak, also written 1337 speak or leet, replaces letters with similar looking numbers and
symbols, so hello becomes h3llo.
Choose the encode direction and pick an intensity level. The converted text appears as you
type.
Yes. Choose the decode direction and each leet token is swapped back for the plain letter it
stands for.
Basic replaces five common letters, standard adds characters such as 7 for t, and heavy uses
multi character tokens such as pipe v pipe for m.
Some leet characters stand for more than one letter, so 1 may come back as i or l. Decoding
is a best guess only.
It leaves capital letters untouched and only converts lowercase ones, so your word shapes
stay recognisable.
No. The whole substitution table is in the page and everything happens in your browser.
You can, but leetspeak is a well known substitution pattern and does not add real strength on
its own.
Yes. The converter is fully responsive and works on phones, tablets and desktop computers.
Yes. The leetspeak converter is free, unlimited and needs no account at all.
Last updated: October 10, 2026