Text & Writing Utilities · Free tool
Caesar Cipher & ROT13
Shift letters by any amount (including ROT13) to encode or decode messages. Classic substitution cipher, free.
Updated April 2026
Encoded (shift +13)
Gur dhvpx oebja sbk whzcf bire gur ynml qbt
Decoded (shift −13)
Gur dhvpx oebja sbk whzcf bire gur ynml qbt
What it does
Shift every letter by a fixed number of positions to encode or decode a message. Classic Caesar cipher and ROT13 in one — useful for puzzles, scouts, and basic obfuscation (not real security).
How to use it
- Paste the message.
- Pick a shift (1–25) or use the ROT13 button.
- Toggle Encode / Decode.
- Copy the result.