> For the complete documentation index, see [llms.txt](https://trizen.gitbook.io/sidef-lang/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://trizen.gitbook.io/sidef-lang/programming_tasks/b/base64_encode_data.md).

# Base64 encode data

```ruby
var data = %f'favicon.ico'.read(:raw)   # binary string
print data.encode_base64                # print to STDOUT
```