Learn Me a Lightning

Understand how the Lightning Network works — Bitcoin's layer-2 for instant, cheap payments.

Start Learning Try Interactive Tools

What is the Lightning Network?

The Lightning Network is a "layer 2" payment protocol built on top of Bitcoin. It enables instant, low-fee transactions by processing them off-chain, while still leveraging Bitcoin's security for final settlement.

⚡

Instant

Transactions settle in milliseconds, not minutes. Perfect for everyday payments.

💰

Low Cost

Fees are fractions of a cent, making microtransactions practical.

🔒

Secure

Built on Bitcoin's security model with cryptographic guarantees.

Explore the Site

📚

Beginners

Start here if you're new to Lightning. Simple explanations with diagrams.

🔧

Technical

Deep dives into the protocol for developers and curious minds.

🛠️

Tools

Interactive tools to explore Lightning concepts hands-on.

🔍

Explorer

Browse the Lightning Network — nodes, channels, and more.

Featured Tool

BOLT4 Onion Packet Builder

Construct and inspect Lightning onion packets step-by-step. Understand how payments are routed through multiple hops while maintaining privacy.

Try the Tool →
🧅

Open Source Project

This project is open source and community-driven. Contribute code, content, or ideas to help others learn about Lightning.

View on GitHub Learn More