HTML link formatting chart?

Can someone point me to a chart that shows what all the “%2F” junk in urls like this are:

The iphone always opens RSS feeds through using links like that, making it difficult to paste the link into a proper rss reader. I can usually figure out the correct symbols but it pisses me off so I’m going to write a script to clean up links like that and make them readable, I just can’t remember what it’s called to google it.

Here ya go.

Usually, most of those codes represent blank spaces.

Easier to just use a URL decoder rather than a manual chart.

Or TinyURL.

ETA: Only %20 is a blank space. The others are other symbols used by scripts and parameters, etc.

Thanks. i thought it was something html specific, can’t believe I didn’t notice it was simple hex.