These pages respond to user inputs.

• Convert hexadecimal Unicode representations, with repairs (19 September 2016)
• Convert Chinese to PinYin (1 September 2016)
• Convert numbers to Chinese (28 November 2013)
• Strip diacritics from text (3 October 2013)
• Day-of-week calculator (16 November 2012)
• Calculate the number of days between two dates (16 November 2012)
• Convert a CIDR format to an IP address range (26 June 2012)
• Geolocate an IP address (26 June 2012)
• Convert an IP address range to CIDR format (26 June 2012)
• Turn numbers into Spanish (15 August 2011)
• Turn numbers into English (16 June 2011)
• Romanize Lao (22 May 2011)
• What characters match a regular expression? (27 August 2009)