CGI Example

Choose a filter from the list below, and type some text into the input area. Submit the form to apply the filter to the text. In response, you'll receive another page like this one, with the text in the input area modified by the filter.

Filters

rot13

Exchange each character in the English alphabet with the character 13 positions removed, preserving case. Applying this filter twice yields the original text.

revline

Reverse the order of characters in each line of input. Applying this filter twice yields the original text.

foldlines

Truncate input lines to 20 characters in width.