Use the Base64 Encoder & Decoder utility to convert a plain-text string to and from base64 encoding.
Use the String Length Calculator to count the number of characters in a string. A useful tool to quickly see if a string will exceed the length of a database field.
Use the URL Encoder & Decoder utility to convert a string that is suitable for use in a URL.
Use the XML/XHTML Encoder & Decoder utility to convert special characters in strings for use in XML and XHTML documents.