QGIS/resources/function_help/json/from_base64

{
  "name": "from_base64",
  "groups": ["Conversions"],
  "type": "function",
  "description": "Decodes a string in the Base64 encoding into a binary value.",
  "arguments": [
    {"arg":"string", "description": "the string to decode"}],
    "examples": [ { "expression":"from_base64('UUdJUw==')", "returns":"'QGIS'"}
    ]
}