ROT13 Encoder/Decoder

Encode or decode text using ROT13 cipher.

Input Text

ROT13 Result

What Is ROT13?

ROT13 (rotate by 13 places) is a simple letter substitution cipher that replaces a letter with the 13th letter after it in the alphabet. ROT13 is a special case of the Caesar cipher which was developed in ancient Rome. Because there are 26 letters in the English alphabet, ROT13 is its own inverse; that is, to undo ROT13, the same algorithm is applied, so the same action can be used for encoding and decoding.

ROT13 Encoder/Decoder Examples

Click to try!

Encode a message with ROT13

This example shows how to encode a simple message using ROT13 cipher.

Decode a ROT13 message

This example shows how to decode a message that was encoded with ROT13.

All Text Tools

Split

Split text into multiple parts using a separator

Join Text

Join text elements with a specified separator

Remove duplicate lines

Quickly delete all repeated lines from text

String To morse

Quickly encode text to morse

Text Replacer

Quickly replace text in your content

Repeat Text

Repeat text multiple times

Truncate Text

Truncate text to a specified length

Reverse

Reverse any text character by character

Randomize case

Randomize the case of letters in text

Convert to Uppercase

Convert text to uppercase

Extract substring

Extract a portion of text between specified positions

Create palindrome

Create text that reads the same forward and backward

Palindrome

Check if text reads the same forward and backward

Text Quoter

Add quotes around text with various styles

Rotate Text

Shift characters in text by position.

Base64 Encoder/Decoder

Encode or decode data using Base64.

Text Statistics

Get statistics about your text

Text Censor

Quickly mask bad words or replace them with alternative words.

Password Generator

Generate secure random passwords with custom options

String URL encoder

Quickly URL-escape a string.

String URL decoder

Quickly URL-unescape a string.

Unicode Encoder / Decoder

Encode or decode text using Unicode escape sequences.

Hidden Character Detector

Find hidden Unicode characters in text