Leet Speak Converter
Transform up to 100,000 characters locally in your browser and preview the substitutions used.
Converts text locally in your browser. Letters and punctuation are preserved.
Enter some text to see the conversion.
Mapping preview
A QUICK WALKTHROUGH
How to use this tool
- Enter or paste plain text.
- Choose a leet level and convert the text.
- Copy the result when it is ready.
Local text conversion
The converter performs character substitutions in your browser. It does not upload, execute, or interpret the input as code.
Leet levels
Basic, advanced, and hacker levels use progressively broader fixed mappings. Unsupported letters, spaces, numbers, punctuation, and line breaks remain unchanged.
GOOD TO KNOW
Common questions
Can it decode leet speak?
No. This tool only converts plain text to leet speak.
Is my text uploaded?
No. Conversion and copying happen locally in your browser.
What happens to punctuation and line breaks?
They remain in their original positions.