base64_decode_tostring()

Applies to: ✅ Microsoft Fabric ✅ Azure Data Explorer ✅ Azure Monitor ✅ Microsoft Sentinel

Decodes a base64 string to a UTF-8 string.

Deprecated aliases: base64_decodestring()

Syntax

base64_decode_tostring(base64_string)

Learn more about syntax conventions.

Parameters

Name	Type	Required	Description
base64_string	string	✔️	The value to decode from base64 to UTF-8 string.

Returns

Returns UTF-8 string decoded from base64 string.

Example

Run the query

print Quine=base64_decode_tostring("S3VzdG8=")

Output

Quine
Kusto

Trying to decode a base64 string that was generated from invalid UTF-8 encoding returns null:

Run the query

print Empty=base64_decode_tostring("U3RyaW5n0KHR0tGA0L7Rh9C60LA=")

Output

Empty

Related content

• To decode base64 strings to an array of long values, see base64_decode_toarray()
• To encode strings to base64 string, see base64_encode_tostring()