base64-tool

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Multi-format encoding/decoding CLI with recursive layer detection for security analysis.

This is a quick overview — security theory, architecture, and full walkthroughs are in the learn modules.

What It Does

• Encode and decode Base64, Base64URL, Base32, Hex, and URL formats
• Auto-detect encoding format with confidence scoring
• Peel command recursively strips multi-layered encoding (WAF bypass analysis)
• Chain multiple encoding steps to test obfuscation patterns
• Pipeline-friendly output for integration into security workflows

Quick Start

uv tool install b64tool
b64tool encode "Hello World"

Tip

This project uses just as a command runner. Type just to see all available commands.

Install: curl -sSf https://just.systems/install.sh | bash -s -- --to ~/.local/bin

Commands

Command	Description
b64tool encode	Encode text into Base64, Base64URL, Base32, Hex, or URL format
b64tool decode	Decode encoded text back to plaintext
b64tool detect	Auto-detect the encoding format with confidence scoring
b64tool peel	Recursively strip multi-layered encoding to reveal original data
b64tool chain	Chain multiple encoding steps together for obfuscation testing

Learn

This project includes step-by-step learning materials covering security theory, architecture, and implementation.

Module	Topic
00 - Overview	Prerequisites and quick start
01 - Concepts	Security theory and real-world breaches
02 - Architecture	System design and data flow
03 - Implementation	Code walkthrough
04 - Challenges	Extension ideas and exercises

License

AGPL 3.0