> For the complete documentation index, see [llms.txt](https://200ok.gitbook.io/200ok-documents/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://200ok.gitbook.io/200ok-documents/user-manual/built-in-functions/math/base64decode.md).

# base64Decode

The fx\_base64Decode function is a Standard function available in 200OK.

**Description**: 

Decodes a Base64-encoded string back to its original UTF-8 text representation. This is the inverse operation of fx\_base64Encode. 

**Syntax**: fx\_base64Decode(Base64\_String)

**Example** : 

Here's how to use the function

<figure><img src="https://1271267903-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F899iGp7icc9A7KXck3HI%2Fuploads%2FoiLOWiEJ9FvttpJIcw0T%2FPicture%20(1).png?alt=media&amp;token=dce2160a-3829-4613-89d5-285911b52230" alt=""><figcaption></figcaption></figure>