- All tools
- Text Tools
ROT13 Encoder/Decoder
ROT13 Encoder/Decoder
Encode or decode text using ROT13 cipher.
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.
Related tools
- All tools
- Text Tools
- SplitSplit text into multiple parts using a separator
- Join TextJoin text elements with a specified separator
- Remove duplicate linesQuickly delete all repeated lines from text
- String To morseQuickly encode text to morse
- Text ReplacerQuickly replace text in your content
- Repeat TextRepeat text multiple times
- Truncate TextTruncate text to a specified length
- Reverse TextReverse any text character by character
- Randomize caseRandomize the case of letters in text
- Convert to UppercaseConvert text to uppercase
- Extract substringExtract a portion of text between specified positions
- Create palindromeCreate text that reads the same forward and backward
- PalindromeCheck if text reads the same forward and backward
- Text QuoterAdd quotes around text with various styles
- Rotate TextShift characters in text by position.
- Base64 Encoder/DecoderEncode or decode data using Base64.
- Text StatisticsGet statistics about your text
- Text CensorQuickly mask bad words or replace them with alternative words.
- Password GeneratorGenerate secure random passwords with custom options
- String URL encoderQuickly URL-escape a string.
- String URL decoderQuickly URL-unescape a string.
- URL EditorInspect and edit URL components and query parameters.
- Unicode Encoder / DecoderEncode or decode text using Unicode escape sequences.
- Hidden Character DetectorFind hidden Unicode characters in text
- Email ExtractorExtract email addresses from text
- Compare TextsCompare two texts and spot differences instantly
- Slug GeneratorGenerate URL-friendly slugs from text.
- BcryptHash strings with Bcrypt
- Table Text ConverterConvert tables between Markdown, CSV, HTML, MySQL, and JSON
- UUID GeneratorCryptographically secure RFC 4122 v4 UUID generator.
- Lorem Ipsum GeneratorPlaceholder text generator by words, sentences, or paragraphs.
- Markdown PreviewerFast, secure Markdown editor with real-time sanitized preview.
- Case ConverterConvert text across casing conventions and programming styles.