Caesar Cipher JS
Professional JavaScript/TypeScript Library for Caesar Cipher
Lightweight, zero-dependency library with multi-language support, intelligent cryptanalysis, and full TypeScript definitions.
Key Features
Multi-Language Support
Built-in support for English, Polish, German, Spanish, and French alphabets with automatic diacritics handling.
TypeScript Ready
Full type definitions included. Enjoy autocomplete and type safety in your IDE.
Intelligent Cryptanalysis
Language-specific frequency analysis and scoring functions for accurate cipher breaking.
Zero Dependencies
Lightweight (3KB gzipped) with no external dependencies. Works in Node.js and browsers.
100% Test Coverage
Thoroughly tested with comprehensive unit tests. Production-ready and reliable.
Dual API Design
Choose between functional or object-oriented API based on your preference.
Quick Start
Get started in seconds with simple, intuitive API
Encrypt Text
import { encrypt } from 'caesar-cipher-js';
const encrypted = encrypt('Hello World', 3);
console.log(encrypted);
// Output: 'Khoor Zruog'Decrypt Text
import { decrypt } from 'caesar-cipher-js';
const decrypted = decrypt('Khoor Zruog', 3);
console.log(decrypted);
// Output: 'Hello World'Break Unknown Cipher
import { bruteforce, scoreEnglishText } from 'caesar-cipher-js';
const results = bruteforce('Khoor Zruog', {
scoreFunction: scoreEnglishText,
maxResults: 3
});
console.log(results[0].text);
// Output: 'Hello World'Multi-Language Example
import { encrypt, ALPHABET_POLISH_LOWER } from 'caesar-cipher-js';
const encrypted = encrypt('Zażółć', 5, {
alphabet: ALPHABET_POLISH_LOWER
});
console.log(encrypted);
// Polish text encryptedPerfect For
Education & Learning
Teach cryptography concepts with interactive examples and automatic cipher breaking demonstrations.
Web Applications
Add cipher functionality to your apps. Works seamlessly with React, Vue, Angular, and vanilla JS.
Games & Puzzles
Create puzzle games, escape rooms, or educational games with built-in cipher mechanics.
Research & Analysis
Analyze historical ciphers or study cryptographic patterns with frequency analysis tools.
Performance
Optimized for speed and efficiency
Benchmarks run on average hardware. Your results may vary.
Ready to Get Started?
Install the library and start encrypting in minutes
Used in Production
This library powers caesar-cipher.com - an interactive online tool with thousands of monthly users.
Open Source
MIT License - Free for personal and commercial use.