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Skip to contentEncrypt or decrypt text with a Caesar shift or ROT13. Tentaco Caesar Cipher / ROT13: review input and get an instant result — free, no sign-up.
Full tool — runs in your browser. No sign-up required.
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Apply a classic Caesar cipher with any shift from 0–25, or use the ROT13 preset. A fun, educational tool for understanding substitution ciphers — not for real security.
Paste or enter your input into Tentaco Caesar Cipher / ROT13. Standard processing runs locally in your browser — contents are not sent to Tentaco servers for that path.
The primary button opens the matching studio mode so you can start without an account. People often search for: caesar cipher, rot13, cipher.
Open Caesar Cipher / ROT13 via the studio button (direct mode).
Paste or type your input.
Adjust options and review the preview or output.
Copy or save the result and re-run if needed.
Transfer to Tentaco: No for the standard mode. Processing: local in the browser. Permanent storage: only if you copy or save the result yourself.
LocalThis tool processes data locally in your browser. Tentaco does not receive your file contents for this mode.
No. Caesar Cipher / ROT13 processes the standard mode locally in your browser; Tentaco does not receive your input for that path.
Yes. Copy the output from Caesar Cipher / ROT13 or download it when the tool offers a file.
Caesar Cipher / ROT13 follows the formats named in the UI and description. Unlisted variants are not guaranteed.
After the first load, Caesar Cipher / ROT13 often keeps working offline. Online dependencies are labeled.
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