> For the complete documentation index, see [llms.txt](https://docs.akto.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.akto.io/test-editor/concepts/overview.md).

# Overview

Akto Test Editor is the test playground for security teams and developers to write their custom tests to find vulnerabilities in APIs.

Test Editor consists of three blocks:

1. [Test Library](/test-editor/concepts/test-library.md) consisting of 1000+ built-in tests.
2. [YAML test](/test-editor/concepts/test-yaml.md) editor.
3. Sample API request and response to test.

<figure><img src="/files/OpHGKpAPK6Xcaqana5K9" alt=""><figcaption></figcaption></figure>