# Extensions

### BApp Store

To find all available extensions, we can click on the `Extender` tab within Burp and select the `BApp Store` sub-tab. Once we do this, we will see a host of extensions. We can sort them by `Popularity` so that we know which ones users are finding most useful:

![BApp Store](https://academy.hackthebox.com/storage/modules/110/burp_bapp_store.jpg)

Note: Some extensions are for Pro users only, while most others are available to everyone.

We see many useful extensions, take some time to go through them and see which are most useful to you, and then try installing and testing them. Let's try installing the `Decoder Improved` extension:

![Burp Extension](https://academy.hackthebox.com/storage/modules/110/burp_extension.jpg)

Note: Some extensions have requirements that are not usually installed on Linux/macOS/Windows by default, like \`Jython\`, so you have to install them before being able to install the extension.

Once we install `Decoder Improved`, we will see its new tab added to Burp. Each extension has a different usage, so we may click on any extension's documentation in `BApp Store` to read more about it or visit its GitHub page for more information about its usage. We can use this extension just as we would use Burp's Decoder, with the benefit of having many additional encoders included. For example, we can input text we want to be hashed with `MD5`, and select `Hash With>MD5`:

![Decoder Improved](https://academy.hackthebox.com/storage/modules/110/burp_extension_decoder_improved.jpg)


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