TransformTool currently supports the following transformations:
HTML Encode/Decode
XML Escape/Unescape
URL Encode/Decode
URL Encode Unicode
URL Encode/Decode raw bytes
Base 64 Encode/Decode
HEX Encode/Decode
Charsets (ASCII, Latin-1, UTF-8, UTF-16)
Deflate/Inflate
GZip/GUnzip
Common hash functions (MD5, SHA-1, SHA-256, SHA-384, SHA-512, RIPEMD-160)

Download
http://transformtool.codeplex.com/releases/view/73662