ROT13 / ROT47 Cipher
NewEncode and decode text using the ROT13 and ROT47 substitution ciphers.
ROT13 and ROT47 are self-inverse substitution ciphers, so applying the same transform twice returns the original text.
Frequently Asked Questions
What is rot13 encoding?
ROT13 encoding is a method of representing binary or text data in an alternative format to ensure safe transmission over systems that may not support raw binary. It is widely used in HTTP headers, URLs, email attachments, and API payloads.
How do I rot47 using ROT13 / ROT47 Cipher?
Paste your input into the text area and select the desired operation — encoded or decoded output appears instantly. You can also upload a file to process its binary contents directly.
Is rot13 the same as encryption?
No. ROT13 encoding is a reversible representation format with no secret key — anyone can decode it. Encryption requires a key and is designed to keep data confidential from unauthorised parties.
What characters are supported?
The tool supports the full Unicode character set for text input and handles arbitrary binary data for file-based operations. There are no restrictions on the input character range.
Can I rot13 files?
Yes. You can drag and drop or select a file to encode its contents. The output is displayed inline and can be copied or downloaded as a text file for use in other applications.