> For the complete documentation index, see [llms.txt](https://docs.acho.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.acho.io/acho-studio/data-prep-projects/applying-actions/data-cleaning.md).

# Data Cleaning

Sometimes, there are some impurities in your data, such as incorrect data types, syntax errors, or missing values. These problems can cause some biases when you grasp insights from your data. Before doing any analysis, you can use **`Data Cleaning`** actions to deal with those impurities and make sure your data has a good quality.

{% content-ref url="/pages/-McFM-hOpk7lBZIBBc2g" %}
[Cleanse](/acho-studio/data-prep-projects/applying-actions/data-cleaning/cleanse.md)
{% endcontent-ref %}

{% content-ref url="/pages/-McFM1300H5ioetLe62Y" %}
[Replace](/acho-studio/data-prep-projects/applying-actions/data-cleaning/replace.md)
{% endcontent-ref %}

{% content-ref url="/pages/-McFM0ilON8sy7NDdkvS" %}
[Change Type](/acho-studio/data-prep-projects/applying-actions/data-cleaning/change-type.md)
{% endcontent-ref %}

{% content-ref url="/pages/-McFLzbzyO-d\_pBZndG0" %}
[Deduplicate](/acho-studio/data-prep-projects/applying-actions/data-cleaning/deduplicate.md)
{% endcontent-ref %}

{% content-ref url="/pages/-McFMAk1aWrDUajjVJnK" %}
[Split](/acho-studio/data-prep-projects/applying-actions/data-cleaning/split.md)
{% endcontent-ref %}

{% content-ref url="/pages/-MksLQhW-YgVTmCuHe0e" %}
[Flatten](/acho-studio/data-prep-projects/applying-actions/data-cleaning/flatten.md)
{% endcontent-ref %}