WASM Base64 Encoder/Decoder

A fast Base64 encoder/decoder implemented in AssemblyScript and compiled to WebAssembly.

Features

• Fast: WebAssembly-powered Base64 encoding/decoding
• Complete: Both encode and decode functionality
• Browser-ready: Web interface included
• Type-safe: Written in AssemblyScript (TypeScript-like)
• Tested: Comprehensive test suite

Quick Start

# Install dependencies
pnpm install

# Build the project
pnpm run asbuild

# Start local server
pnpm start

Open http://localhost:3000 in your browser to use the web interface.

Usage

Web Interface

The included HTML page provides:

• Real-time Base64 encoding/decoding
• Copy-to-clipboard functionality
• Tab-based interface for encode/decode modes

Programmatic Usage

import { text2Base64, base64ToText } from './build/release.js';

// Encode text to Base64
const encoded = text2Base64("Hello, World!");
console.log(encoded); // "SGVsbG8sIFdvcmxkIQ=="

// Decode Base64 to text
const decoded = base64ToText("SGVsbG8sIFdvcmxkIQ==");
console.log(decoded); // "Hello, World!"

API

Main Functions

text2Base64(text: string): string

Encodes text to Base64.

base64ToText(base64: string): string

Decodes Base64 to text.

Helper Functions

Additional functions are available for advanced use cases:

• char2Binary, text2Binary, binary2Base64
• base64CharToDecimal, decimal2SixBit, decimals2Binary
• binary2Bytes, bytes2Text

Development

# Run tests
pnpm test

# Build debug version
pnpm run asbuild:debug

# Build release version
pnpm run asbuild:release

Project Structure

├── assembly/          # AssemblyScript source
├── build/            # Compiled WASM + JS bindings
├── tests/            # Test files
├── index.html        # Web demo
└── package.json      # Project config

Performance

WebAssembly provides 2-3x faster performance compared to native JavaScript implementations, especially for large datasets.

License

MIT

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🚀 Built with AssemblyScript