ROT13 Encoder/Decoder

ROT13 applies the classic 13-letter alphabet shift

This page is for simple ROT13 encoding and decoding of plain Latin letters. It is useful for puzzles, lightweight obfuscation in forums or notes, and quick demonstrations of a reversible letter-shift transform.

The current converter only rotates A-Z letters. Numbers, punctuation, spaces, and other characters are left in place. Because ROT13 is symmetrical, the same page works for both directions.

What the current ROT13 page actually changes

Every Latin letter is shifted by 13 positions within the alphabet, while non-letter characters remain untouched. That makes the output easy to inspect, but it is obviously not encryption and should never be treated as secure protection.

Example	Value
Input	Plain English text or an existing ROT13 string.
Output	The same string with alphabetic characters rotated by 13 positions.

Good uses for this ROT13 converter

• Solving or sharing wordplay and puzzle content.
• Applying lightweight reversible obfuscation to spoiler text.
• Demonstrating a simple classical substitution example.

What ROT13 should not be mistaken for

This page is not an encryption tool, password tool, or secure messaging tool. It is only a reversible letter shift for plain alphabetic text.

Related routes

• Morse Code Converter: switch to dots-and-dashes output instead of letter rotation.
• Text to Binary: inspect text through code values rather than alphabet shifting.
• URL Encode: percent-encode text for transport instead of applying a playful cipher.
• Base64 Encoder: create transport-friendly Base64 text instead of ROT13 output.

Frequently asked questions

Does the same page decode ROT13 too?

Yes. Applying ROT13 again returns the original text.

Are numbers and punctuation changed?

No. The current tool only rotates letters.

Is ROT13 secure?

No. It is a simple reversible letter substitution, not real encryption.