> For the complete documentation index, see [llms.txt](https://docs.ddosify.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ddosify.com/ddosify/performance-testing/parametrization.md).

# Parametrization

<figure><img src="/files/HJcwymcXto0PVYlbavPJ" alt=""><figcaption><p>Ddosify Dynamic Variable Feature</p></figcaption></figure>

When designing a test scenario, accurately simulating user behavior is essential. The testing platform should be capable of injecting random variables in the appropriate locations. Ddosify supports parametrization (dynamic variables) in URLs, headers, payload (body), and basic authentication. We support all the random methods that [Postman does](https://learning.postman.com/docs/writing-scripts/script-references/variables-list/). If you use `{{$randomVariable}}` in Postman, simply replace it with `{{_randomVariable}}` in Ddosify by changing `$` to `_`. This allows Ddosify to send requests with dynamic variables, simulating a realistic load test on your system.

{% hint style="info" %}
Please check the [Dynamic Variables](/ddosify/performance-testing/dynamic-variables-parametrization.md) section to see the complete list.
{% endhint %}

In addition to Dynamic Variables, Ddosify offers support for [Test Data](/ddosify/performance-testing/test-data-import.md) injection using CSV files and [Correlation](/ddosify/performance-testing/correlation.md), allowing you to extract variables from one step and utilize the extracted values in subsequent steps.


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