TcpCatcher - Screenshots

Starting TcpCatcher (you should use a -Xmx option..)

Some Http traffic.. right click on one row in order to open request and response detailed view

An http request and its reply.
Note that you can rollover any header to get its definition. You can also use search engine to quickly locate a word. Note that, in http response, html gzip content has been deflated and is pretty printed.

Same http packet : raw data view (don't miss a particular byte value), http view (see http headers) and image view (see rendered image)

You can customize display : choose columns you want to see, change row height (to see full header) or right click on column header to apply a filter (looking for Image Content types for example)

Select two packets | right click | choose 'Compare with each other' and highlight differences between two packets