> For the complete documentation index, see [llms.txt](https://docs.apryse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apryse.com/web/get-started/faq/localstorage.md).

# Disable localStorage usage

World's #1 PDF SDK Library for Web, Mobile, Server, Desktop

{% hint style="info" %}
localStorage is not used for rendering or storing PDFs.
{% endhint %}

WebViewer does use localStorage for saving preferences like used styles for annotation tools. You can turn it off or on.

In the UI we save recently used styles for annotation tools in localStorage by default. You can disable this by [disabling](https://sdk.apryse.com/api/web/UI.html#.disableFeatures) the [localStorage feature](https://sdk.apryse.com/api/web/UI.html#.Feature).

When loading a WebViewer Server document we also set an isCached localStorage flag but this is just a boolean value.


---

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