# Sandbox.SandboxSystemExtensions.Base64Decode

```csharp
static string Base64Decode(string base64EncodedData)
```

Convert from a base64 encoded string

### Parameters

- `base64EncodedData` (`string`)

### Returns

`string`

Declared in [Sandbox.SandboxSystemExtensions](/api/Sandbox.SandboxSystemExtensions).
Assembly: `Sandbox.System`.