# JA3 Fingerprint

Generates a JA3 fingerprint to help identify TLS clients based on hashing together values from the Client Hello. Input: A hex stream of the TLS Client Hello packet application layer. JA3 Fingerprint lives in the **Networking** category of the `fx` menu.

## Parameters

| Parameter     | Type   | Required | Default       | Description                                                 |
| ------------- | ------ | -------- | ------------- | ----------------------------------------------------------- |
| Input         | string | yes      | —             | Value to transform. Previous step output or a literal.      |
| Input format  | string | no       | `Hex`         | Choose one of: `Hex`, `Base64`, `Raw`.                      |
| Output format | string | no       | `Hash digest` | Choose one of: `Hash digest`, `JA3 string`, `Full details`. |

`Input` is the primary value (previous step output or a literal).

## Returned value

| Type     | Description                                   |
| -------- | --------------------------------------------- |
| `string` | Result of the JA3 Fingerprint transformation. |

## Example

<details>
<summary>Run JA3 Fingerprint</summary>

Generates a JA3 fingerprint to help identify TLS clients based on hashing together values from the Client Hello. Adjust optional parameters when the defaults do not match your payload.

1. Set **Input** to the value to transform (previous step output or a literal).

2. Review **Input format**, **Output format** and keep defaults unless your format requires otherwise.

3. Confirm **Output value** shows the transformed result.

</details>