---
title: "Linkvalidator information for developers"
manual: "Link Validator"
version: "14.3"
permalink: "https://docs.typo3.org/permalink/typo3/cms-linkvalidator:development@14.3"
source: "Development/Index.rst"
rendered: "2026-09-22T20:17:07+00:00"
---

# Linkvalidator information for developers {#development}

**[Custom linktypes](https://docs.typo3.org/permalink/typo3/cms-linkvalidator:linktype-implementation@14.3)**

The LinkValidator uses so called `linktypes` to check for different
types of links. Learn how to implement a custom linktype within
an extension.

**[API](https://docs.typo3.org/permalink/typo3/cms-linkvalidator:api@14.3)**

Overview of important classes and interfaces in the public API.