Is this tool private?

Yes. All processing happens locally in your browser. No data is uploaded.

What extras does this tool have?

Extras: (1) Core function, (2) Batch mode, (3) Copy results, (4) Download, (5) History, (6) CSV export, (7) Custom options, (8) Validation, (9) Warnings, (10) Stats, (11) Multi-format, (12) Configurable, (13) Preview.

Text Runs in your browser

Leetspeak Translator

Convert text to leetspeak (1337) and back. Multiple levels. 100% private. 100% private.

100% Private Works Offline Instant

Input text

Output (10 chars)6/10 substituted (60%)

l337 5p34k

Custom substitution map (key:value per line)

Custom output: l33t sp34k

Inverse table (basic)

0 → o1 → i3 → e4 → a5 → s7 → t

Batch (one per line)

l337

h4ck3r

3l173

Privacy: all processing runs locally in your browser.

Convert text to leetspeak (1337) and back. Multiple levels. 100% private. 100% private. Everything runs locally in your browser — your data never leaves your device.

How to use

Enter your input in the tool above.
Adjust any options to your preference.
Use the Copy or Download buttons to save the result.
Everything happens locally — your data never leaves your browser.

All tools