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Caesar cipher

Shift every letter along the alphabet. Caesar used three; pick any shift you like, either way.

How many places each letter moves. 3 is Caesar's own.

Result

The link opens a page that reads it. Without the key, your friend has to crack it. The message travels after the # in the link, which a browser never sends to our server.

Caesar shift chart

Every letter, A to Z with the shift 3.

Where it comes from

The Roman historian Suetonius wrote that Julius Caesar kept his letters private by writing each letter three places further along the alphabet: D for A, E for B. It is the oldest cipher with a name, and the first one most people ever crack.

A message worth knowing: Veni, vidi, vici. Caesar's famous report of a quick victory in 47 BC, written here in his own shift of three.

Learn it by heart

This is the cipher desk from Covert Mail, our free app for learning codes. The app teaches Caesar shift a few characters at a time, plans practice around the ones you miss, and keeps an archive of famous real messages to unlock. It is coming soon to the App Store and Google Play.

Coming soon to the App Store and Google Play

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