> ## Documentation Index
> Fetch the complete documentation index at: https://www.integrate.io/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# ETL: Base64DecodeToString

> Decode a Base64-encoded string directly into readable text with a specified character encoding. Use for text decoding in ETL data pipelines.

## Description

Decodes a Base64 string into a string with specified encoding.

## Syntax

`Base64DecodeToString(string[, charset_expression])`

## Arguments

*string* - string\_expression

*charset\_expression* - string\_expression indicating the encoding. The default is UTF-8. See the list of available character sets in [https://docs.oracle.com/javase/7/docs/api/java/nio/charset/Charset.html](https://docs.oracle.com/javase/7/docs/api/java/nio/charset/Charset.html).

## Examples

`Base64DecodeToString('aGVsbG8gd29ybGQ=','UTF-8')` returns 'hello world'

## Notes

If the input expression is not a valid Base64 string, it will be ignored and an empty string will be returned.

## Return value datatype

String

## Impact of null value

If input is null, returns null.