What shift value does this use?

The shift defaults to 3 (the value Julius Caesar used) but you can change it with the Shift control. To decode, use a shift of 26 minus the original — e.g. 23 to reverse a shift of 3.

How do I decode a Caesar cipher?

Set the Shift to 26 minus the encoding shift. A message encoded with shift 3 decodes with shift 23.

No — Caesar cipher has only 25 possible keys and can be broken in seconds. Use it for learning and puzzles only.

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Caesar Cipher

Encode/decode text using Caesar cipher (shift by 3)

About the Caesar Cipher tool

The Caesar Cipher is one of the oldest known encryption techniques, used by Julius Caesar to protect military communications. It shifts each letter in the alphabet by a fixed number of positions (default: 3). It's a foundational concept in cryptography and classic coding challenges.

Shift

Input

0 words·0 characters·0 lines·0 min read

Output

0 words·0 characters·0 lines

How to use

1Paste your plain text to encode it (shift of 3 is applied).
2To decode, paste the ciphered text — shift by 23 (–3) is the reverse.
3Copy the encoded output.

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