Base64Decode

Decodes a Base64-encoded string back to its original format using UTF-8 encoding.

Syntax

Base64Decode(input)

Parameters

• input (string): The Base64-encoded string to decode

Returns

• string: The decoded string in its original format

Description

Converts a Base64-encoded string back to its original representation. The function decodes the Base64 format to bytes and then interprets those bytes as a UTF-8 encoded string.

This is the inverse operation of Base64Encode. It is commonly used to decode data received from APIs or to reverse Base64 encoding applied for transmission over text-based protocols.

Throws a JyroRuntimeException if the input string is not valid Base64 format.

Examples

var result1 = Base64Decode("SGVsbG8sIFdvcmxkIQ==")
# Returns "Hello, World!"

var result2 = Base64Decode("Snlybw==")
# Returns "Jyro"

var result3 = Base64Decode("")
# Returns ""

# Decode a basic authentication header
var decoded = Base64Decode("dXNlcm5hbWU6cGFzc3dvcmQ=")
# Returns "username:password"

# Round-trip encoding and decoding
var original = "Sensitive Data"
var encoded = Base64Encode(original)
var decoded = Base64Decode(encoded)
# decoded equals "Sensitive Data"

# Decode API response data
var apiResponse = {
    "data": "eyJuYW1lIjogIkpvaG4ifQ=="
}
var decodedData = Base64Decode(apiResponse["data"])
# decodedData contains the original JSON string

Notes

• Assumes the encoded data uses UTF-8 encoding
• Throws JyroRuntimeException if the input is not valid Base64
• Empty strings return empty strings
• This is the inverse operation of Base64Encode
• Use for decoding data received from APIs or text-based protocols
• See Base64Encode() and InvokeRestMethod()