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Cryptography & Ciphers

ROT47 Cipher Processor

Apply ROT47 with explicit key, format, and algorithm settings. Enter the data and key material, choose the parameters, then review the result.

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Apply ROT47 with explicit key, format, and algorithm settings. Enter the data and key material, choose the parameters, then review the result.

This tool runs open-source code from CyberChef by GCHQ (Apache License 2.0). See open-source credits.

ROT47 Cipher Processor uses ROT47 Cipher to process the supplied input. The operation returns transformed text according to its selected alphabet or cipher convention. This record describes cipher processing for ROT47 Cipher Processor.

The operation returns transformed text according to its selected alphabet or cipher convention. This record describes cipher processing for ROT47 Cipher Processor. Processing runs in the browser for this catalog category, so the result depends on the supplied bytes and settings. Processing runs in the browser.

This classical cipher operation transforms text by a known rule; it does not provide modern confidentiality or integrity.

Instructions

  1. Provide text or data for this tool.
  2. Use HELLO as a safe public test value. This applies to ROT47 Cipher Processor.
  3. Record the alphabet and translation settings with the result. This applies to ROT47 Cipher Processor.
  4. Round-trip the output when a paired operation exists. This applies to ROT47 Cipher Processor.

Example

Input: Message "HELLO" with the operation defaults and a public sample key when required. Operation direction: cipher processing; algorithm: ROT47 Cipher Processor.

Settings: ROT47 Cipher Processor: Select the operation's documented alphabet, key, delimiter, or translation option. Use Text input and Text output for the readable fixture. Keep the same settings for the paired direction.

Result: The operation returns transformed text according to its selected alphabet or cipher convention. This record describes cipher processing for ROT47 Cipher Processor. Processing runs in the browser for this catalog category, so the result depends on the supplied bytes and settings.

Limits

  • ROT47 Cipher Processor: Classical substitution and transposition ciphers are not suitable for secret data.
  • ROT47 Cipher Processor: Alphabet, spacing, and case rules can change the result.
  • ROT47 Cipher Processor: A successful round trip does not prove security or message authenticity.

Questions

Which characters does ROT47 rotate?

The operation rotates printable ASCII characters from ! through ~. Amount controls the offset within that range. It differs from ROT13, which targets selected letter and number groups.

How do I reverse a ROT47 transformation?

For the usual 47-position rotation, applying the same transformation again restores characters in the supported range. If Amount changes, use the matching inverse rotation instead. Keep spaces and unsupported characters intact during comparison.

Does ROT47 encrypt with a password?

No. ROT47 is a fixed character rotation with a configurable amount. It does not provide a secret key or authentication. Use it for reversible text exercises rather than confidential messages.