---
title: "xDB Data Migration Tool"
slug: "xdb-data-migration-tool"
abstract: "Introduction to customizing and extending the xDB Data Migration Tool with commerce data or custom data."
---
# xDB Data Migration Tool

The xDB Data Migration Tool documentation describes how to customize and extend the tool available for migrating xDB data from Sitecore 8.x to Sitecore 9.0.1.

> [!note]
> This guide assumes that you have xDB Data Migration Tool installed on your Sitecore server and a tenant has been created. The installation guide covers both of these requirements. It is available on the Sitecore Downloads site.

- [Standard mappings](https://doc.sitecore.com/xp/en/developers/dmt/20/xdb-data-migration-tool/standard-mappings.html "Standard mappings")
- [Commerce mappings](https://doc.sitecore.com/xp/en/developers/dmt/20/xdb-data-migration-tool/commerce-mappings.html "Commerce mappings")
- [Adding custom data](https://doc.sitecore.com/xp/en/developers/dmt/20/xdb-data-migration-tool/adding-custom-data.html "Adding custom data")