Text Encryptor / Decryptor
Encode and decode text using classic ciphers — Vigenère, ROT13, and Atbash. Runs entirely in your browser.
About Classic Ciphers
Learn about the historical encryption algorithms implemented in this tool.
Classic ciphers represent the foundational history of cryptography. Long before computers and modern encryption standards, people used substitution and transposition techniques to protect confidential communications.
Our Text Encryptor / Decryptor lets you experiment with three distinct historical ciphers directly in your browser without transmitting any data over the internet.
Vigenère Cipher
Uses a keyword to shift letters across a polyalphabetic table, making frequency analysis significantly harder.
ROT13 Cipher
A special case of the Caesar cipher that shifts each letter forward by 13 positions in the alphabet.
Atbash Cipher
An ancient Hebrew substitution cipher that maps the first letter to the last, second to second-to-last, and so on.
Instant Transformation
Your output updates dynamically with every keystroke for a seamless, fast user experience.
100% Client-Side
Processing happens completely inside your browser sandbox. No messages or keys are ever logged or uploaded.
One-Click Copy
Quickly copy your encrypted or decrypted payload directly to your system clipboard with a single click.