ROT13 is a simple letter substitution cipher that replaces a letter with the 13th letter after it in the alphabet. It is its own inverse, meaning the same operation enciphers and deciphers the text.
Privacy Protected
ROT13 Cipher
Encode and decode text using the classic ROT13 substitution cipher. A simple way to obscure spoilers or puzzles.
ROT13 Encryption/Decryption
Enter text to transform
ROT13 Text Rotator
Encode and decode text using the classic ROT13 substitution cipher. Simple, fast, and private.
1
Paste Text
Enter the content you want to scramble or unscramble.
2
Instant Shift
Our tool automatically rotates letters by 13 positions.
3
Copy result
Grab the resulting text and use it anywhere instantly.
Key Features
Instant Encryption
Encrypts and decrypts text instantly using the ROT13 algorithm.
Privacy Focused
Text processing happens locally; nothing is sent to our servers.
Simple Swap
Replaces each letter with the 13th letter following it.
No Key Needed
Standard algorithm requires no password to decode.
Frequently Asked Questions
It's commonly used in online forums to hide spoilers, punchlines to jokes, or offensive content from a casual glance.
No, it provides no real cryptographic security. It is easily reversible and meant for obfuscation, not encryption.
Related Tools
View allBase64 Converter
Encode and decode Base64 strings (Standard).
Base64 URL Safe
Encode/decode Base64 safe for URLs and filenames.
Base32 Converter
Encode/decode data using the Base32 (RFC 4648) algorithm.
Base58 Converter
Bitcoin-style Base58 encoding without ambiguous characters.
Base62 Converter
Compact alphanumeric encoding for URL shorteners.
Base85 (Ascii85)
Efficient binary-to-text encoding used in PDF and Adobe.
Last updated on