ASCII Smuggler

Payload encoding toolkit for Unicode smuggling, steganography, and text obfuscation.

Live Demo →

What it does

Encode and decode text using 8 different smuggling techniques:

Technique	Category	Risk	Description
Unicode Confusables	Visual	High	Cyrillic/Greek lookalike substitution
Zero-Width Encoding	Steganographic	Critical	Invisible zero-width character encoding
Hex Escape Encoding	Obfuscation	Medium	\xNN hex escape sequences
Chunked Base64	Obfuscation	Medium	Indexed base64 segments
RTL Override	Directional	High	Right-to-left text direction spoofing
HTML Comment Injection	Structural	Medium	Payload hidden in HTML comments
Case-Bit Steganography	Steganographic	Low	Binary data in letter casing
Multi-Script Homoglyphs	Visual	High	Cross-script character substitution

Features

• Pipeline mode — chain multiple techniques together
• Diff view — see exactly which codepoints changed
• Hex dump — raw byte inspection
• Codepoint inspector — visual Unicode analysis
• Operation log — track every encoding step
• Copy / Reverse — quick workflow actions
• Responsive — works on mobile

Stack

• Astro — static site framework
• React — interactive island
• Tailwind CSS v4 — styling
• Cloudflare Pages — hosting

Development

npm install
npm run dev

Open http://localhost:4321.

Build

npm run build

Output goes to dist/.

Deploy to Cloudflare Pages

Option 1: Git integration

1. Push to GitHub
2. Go to Cloudflare Pages
3. Select the repo
4. Settings:
   • Build command: npm run build
   • Build output: dist
   • Node version: 18+

Option 2: Direct upload

npm run build
npx wrangler pages deploy dist --project-name=ascii-smuggler

Educational Purpose

This tool is built for security research and education. Understanding these encoding techniques helps defenders build better detection systems. Use responsibly.

License

MIT