Bitcoin Address Decoder

A simple, mobile-friendly static web app for decoding any Bitcoin address into its network, type, payload, and checksum details — all entirely in your browser.

Features

• Supports Base58Check (P2PKH, P2SH) and Bech32/Bech32m (P2WPKH, P2WSH, Taproot, and custom witness versions)
• Detects network (mainnet, testnet, regtest, or unknown HRP/version byte)
• Validates checksums per BIP-173, BIP-350, and Base58Check rules
• Displays payload in hex with copy-to-clipboard
• Works fully offline (no data ever leaves your browser)
• Responsive, clean interface optimized for desktop and mobile

How to Use

1. Paste or type any Bitcoin address (mainnet, testnet, or regtest) into the input field
2. Click Decode or press Enter
3. View the encoding, network, type, checksum validity, and payload
4. Copy the raw payload if needed for further analysis

Installation

1. Clone this repository
2. Open index.html in a modern web browser
3. (Optional) Add to home screen for quick offline use

Technologies Used

• HTML5
• Tailwind CSS (CDN build)
• Vanilla JavaScript
• BIP-173 / BIP-350 Bech32 & Bech32m decoding
• Base58Check decoding and checksum validation

Development

1. Clone the repository
2. Edit index.html in your code editor
3. Open index.html in a browser to test changes
4. No build step required — it's pure HTML, CSS, and JavaScript

License

The Unlicense for more information.

Support

PRs are welcome! I’m open to any/all suggestions.