Burp Suite

Burp Suite is a set of tools for web application security testing.

First and foremost, use the button open browser to open a browser that is configured to use Burp Suite as a proxy.

Decoder

Decoder is a tool that can be used to decode/encode data. It is a very useful tool for web application security testing.

In this example we encoded a string into base64.

Repeater

Repeater is a tool that can be used to repeat requests. Specially usefull when want to do crafted payloads.

While you are here, you can click on a request then CTRL+R to send it to the repeater. or second click on the request and select Send to Repeater.

And here we can modify the request and send it again.