TransformTool - the encoding multi-tool

TransformTool lets you easily work with a number of inputs, and enables you to apply a series of operations to each input. You can install it with a click of button, and it will install and run for unprivileged users as long as the .Net framework (3.5) is available. TransformTool is built with security in mind, since debugging sometimes can involve production data or otherwise sensitive information.

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