ROT47 Encoder & Decoder | ASCII Cipher Tool
Encode or decode text using ROT47 cipher—a variant of ROT13 that works on all printable ASCII characters (33-126), including numbers and symbols. Perfect for simple obfuscation and text transformation. All processing happens locally in your browser.
How to Use This Tool
- 1
Choose Encode or Decode mode (both use the same operation).
- 2
Paste or type your text in the input area.
- 3
Live mode updates instantly; Manual mode requires clicking the button.
- 4
Copy the result or download as a .txt file.
- 5
Use Swap to send output back to input and switch modes.
Use Cases & Examples
Text Obfuscation
Simple obfuscation for hiding spoilers, answers, or casual text in forums and chats.
Educational Tool
Learn about substitution ciphers and character encoding in a hands-on way.
Puzzles & Games
Quick transformation for puzzles, games, and creative text experiments.
Testing & Development
Test how applications handle transformed ASCII characters.
How ROT47 Works
ROT47 rotates ASCII characters 33-126 (printable characters) by 47 positions within the 94-character range.
The formula is: output = 33 + ((input - 33 + 47) % 94) for characters in range 33-126.
ROT47 is its own inverse: applying it twice returns the original text.
Unlike ROT13 (letters only), ROT47 transforms letters, numbers, and symbols.
Frequently Asked Questions
Q.What's the difference between ROT47 and ROT13?
A. ROT47 is a variant of ROT13 that rotates all printable ASCII characters (33-126) by 47 positions, including letters, numbers, and symbols. ROT13 only rotates letters A-Z.
Q.Is ROT47 secure for protecting sensitive data?
A. No. ROT47 is a simple substitution cipher meant for obfuscation, not security. Anyone can easily decode it. Use proper encryption (AES, RSA) for sensitive data.
Q.Can I decode ROT47 by encoding again?
A. Yes. ROT47 is its own inverse—encoding and decoding use the same operation. Applying ROT47 twice returns the original text.
Q.Does ROT47 work with Unicode characters?
A. Yes. ROT47 works on all printable ASCII characters including Unicode, but only ASCII characters 33-126 are transformed. Other characters pass through unchanged.
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