ROT13 Encoder and Decoder

Hide spoilers and puzzle answers with ROT13. Apply it again to read the original.

How to use the ROT13 Encoder and Decoder

  1. Type or paste your text into the box on the left.
  2. Adjust the options above if you need to. The result updates as you type.
  3. Click Copy result or Download to use your result.

What you can use it for

  • Hide spoilers and punchlines
  • Solve CTF and puzzle clues
  • Learn simple ciphers

Private by design

The ROT13 Encoder and Decoder runs entirely in your browser. Your text and files are never uploaded or stored on a server, so it is safe for work documents and personal information. It is free, with no sign-up and no limits on how often you use it.

Frequently asked questions

How do I decode ROT13?

Apply ROT13 again. Shifting by 13 twice brings you back to the start.

What does ROT47 change?

It rotates all printable ASCII characters, including numbers and symbols.

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