---
url: /flow/guide/scripting-reference/functions/encryption/base64decode.md
---

# Base64Decode

## Declaration

`Function Base64Decode( Input : string) : String;`

### Example

```pascal
procedure OnMapEvent(var Value:Variant);
var
vOriginal, vEncoded, vDecoded: string;
begin
vOriginal := 'cameron';
vEncoded := Base64Encode(vOriginal); // value will be 'Y2FtZXJvbg=='
  vDecoded := Base64Decode(vEncoded); // value will be back to 'cameron'
Value := vDecoded;
end;
```

## Description

Decodes the input value using Base64.

Base64 encoding/decoding is commonly used when there is a need to encode binary data for transfer over media that is designed to deal with "plain text" data. This is to avoid the situation where a binary data character could be mistakenly interpreted as a control character (or as an invalid character) and thus cause the data packet to be interrupted or become corrupted. Base64 is used in a number of common applications, such as storing complex data in XML.