Easily encode or decode text using the ROT13 method — simple, fast, and privacy-friendly.
The ROT13 Encoder / Decoder is a free online tool that converts plain text using the ROT13 algorithm. ROT13 stands for “Rotate by 13 places,” which means every letter in the text is replaced by another letter located 13 positions after it in the English alphabet. For example, the letter A becomes N, and B becomes O. This method is commonly used for simple text obfuscation, puzzle games, message hiding, or preventing spoilers in public forums.
ROT13 is a form of substitution cipher. It only works with alphabetical characters (A-Z and a-z). Numbers, spaces, and special characters remain unchanged. The most interesting fact about ROT13 is that it is reversible. That means if you apply ROT13 again to an encoded text, you will get the original message back.
| Original Text | ROT13 Encoded |
|---|---|
| Hello World | Uryyb Jbeyq |
| ChatGPT is amazing | PungTGC vf nznmvat |
ROT13 is not a powerful encryption method, but it is very useful in everyday writing. It helps to hide information that should not be immediately visible. Although it is not secure enough for sensitive data, it can be used for minor privacy purposes.
Using the tool is extremely easy. Just follow these steps:
| A → N | B → O | C → P | D → Q | E → R | F → S |
|---|---|---|---|---|---|
| G → T | H → U | I → V | J → W | K → X | L → Y |
| M → Z | N → A | O → B | P → C | Q → D | R → E |
| S → F | T → G | U → H | V → I | W → J | X → K |
| Y → L | Z → M |
No. ROT13 is not considered secure encryption. It is only a basic text transformation meant for hiding information from casual readers. Anyone familiar with ROT13 can easily decode it. If you need strong encryption for passwords, financial data, or personal information, you should use modern encryption methods like AES, RSA, or SHA-256.
Many people confuse ROT13 with encryption, but technically it is only a basic cipher. It does not require a decryption key and can be decoded instantly using the same algorithm.
| Feature | ROT13 | Modern Encryption |
|---|---|---|
| Security Level | Very Low | High |
| Requires Key? | No | Yes |
| Reversible? | Yes | Yes/No (depends on method) |
| Purpose | Simple obfuscation | Secure data protection |
The ROT13 Encoder / Decoder is a handy tool for writers, forum users, developers, teachers, and puzzle creators. It is not a security solution but a text transformation method. If you want to hide a short message, avoid spoilers, or create fun word puzzles, this tool is perfect for you. Try it now and convert your text instantly!