Cryptography & Ciphers
Cetacean Cipher Decoder
Decode Cetacean text made from uppercase E and lowercase e. Use complete 16-symbol groups; no secret key is needed.
This tool runs open-source code from CyberChef by GCHQ (Apache License 2.0). See open-source credits.
Uppercase E represents zero; lowercase e represents one. Each sixteen-symbol block encodes a UTF-16 code unit.
The result contains the decoded text. Literal input spaces remain spaces.
- Read a puzzle or CTF clue written only in E and e characters.
Sources: Unicode FAQ: UTF-16 code units
Read hi from E and e blocks
Input: EEEEEEEEEeeEeEEEEEEEEEEEEeeEeEEe
Settings: has no key or options. Paste all 32 symbols as one run.
Result: hi
The two complete blocks decode to h and i.
Preserve case and complete character blocks
- Paste the E/e text without changing letter case.
- Remove line breaks or tabs added during copying.
- Run the decoder.
- Incomplete blocks fail validation.
- The format has no secret key.