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Classic Ciphers & Codes

Caesar, ROT13, ROT47, Vigenère, Atbash, Affine, Morse, Bacon, rail fence, XOR, NATO, Braille and more.

Free, no uploads, no sign-up. Runs 100% in your browser.

How Classic Ciphers & Codes works

Each cipher is a small, tested function that runs as you type. Caesar decoding also lists all 25 shifts ranked by how English they look, and Morse code can be played as sound.

How to use Classic Ciphers & Codes

1. Open Classic Ciphers & Codes and paste or type your input.
2. Results update instantly as you type.
3. Tweak options such as format, indentation or algorithm.
4. Copy the output or download it as a file.

Tips

• Everything is computed locally. Safe for tokens, keys and private data.
• Use Ctrl/⌘ + K to jump between developer tools quickly.

Classic Ciphers & Codes FAQ

Are my files uploaded?

No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.

Is it free? Are there limits or watermarks?

Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.

Does it work offline?

Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.

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