Text & encoding
ROT13 Encoder / Decoder
Apply the ROT13 substitution cipher to text. Nothing you enter leaves your browser.
Your result will appear here.
What this tool does
About the ROT13 Encoder / Decoder
Apply the ROT13 substitution cipher to text. It is useful for preparing text for another system, inspecting an encoded value, or applying a repeatable cleanup step.
It is useful for preparing text for another system, inspecting an encoded value, or applying a repeatable cleanup step.
How to use it
- Enter text in the input pane. Use the example button if you want to see the expected syntax.
- Review the input for the structure shown in the example. Then select “Apply ROT13.”
- Inspect the result for warnings or structural differences, then copy it into the destination system.
Practical example
Start with a known input
Try this sample input: Hello, FormatCalc! Select “Apply ROT13” and compare the result with the source before using it elsewhere.
What to know about the result
- Processing happens in this browser. Your entered text and selected files are not sent to FormatCalc for conversion.
Common questions
Using the ROT13 Encoder / Decoder
Is the ROT13 Encoder / Decoder free to use?
Yes. FormatCalc's ROT13 Encoder / Decoder is free to use with no account required.
Is my data private when I use the ROT13 Encoder / Decoder?
Yes. This tool processes your input locally in your browser. FormatCalc does not upload or store what you enter.
How do I use the ROT13 Encoder / Decoder?
Paste or type your input, select any available options, and choose Apply ROT13. You can then copy the result.
What should I check before using the result?
Processing happens in this browser. Your entered text and selected files are not sent to FormatCalc for conversion.