ROT13 & Text Encodings

ROT13 shifts every letter 13 positions in the alphabet. Because the alphabet has 26 letters, applying ROT13 twice returns the original text — it is its own inverse. It is commonly used on forums to hide spoilers or puzzle solutions without any real security. Base64 encodes binary or text data as printable ASCII, widely used in email, data URLs, and API authentication. URL encoding replaces unsafe characters with percent-encoded equivalents required for valid URLs.

Frequently asked questions

Is ROT13 a real encryption?

No. ROT13 provides no security — anyone who recognizes it can decode it instantly. It is a simple obfuscation, not encryption. For real encryption, use AES or similar cryptographic algorithms.