string decoder freeware downloads
URL Escaped Encoding Decoder
1.0 freeware download... taken not to escape or un-escape the same string more than once, since un-escaping an already un-escaped string might lead to misinterpreting a percent data character ...
Base64
1.9 freeware download... used in encoding digital certificates, in encoding user:password string in an Authorization: header for HTTP. The spec ... it suitable for encoding binary data as SQL strings, that will work no matter what the encoding. ...