DataWeave 2.2 is compatible and bundled with Mule 4.2. Standard Support for Mule 4.2 ended on May 2, 2021, and this version of Mule will reach its End of Life on May 2, 2023, when Extended Support ends.

Deployments of new applications to CloudHub that use this version of Mule are no longer allowed. Only in-place updates to applications are permitted.

MuleSoft recommends that you upgrade to the latest version of Mule 4 that is in Standard Support so that your applications run with the latest fixes and security enhancements.

toBase64(Binary): String

Transforms a binary value into a Base64 string.


Name Description


The binary value to transform.


This example transforms a binary value into a Base64 encoded string. In this case, the binary value represents an image.


%dw 2.0

import dw::Crypto
import toBase64 from dw::core::Binaries

var emailChecksum = Crypto::MD5("achaval@gmail.com" as Binary)
var image = readUrl(log("https://www.gravatar.com/avatar/$(emailChecksum)"), "application/octet-stream")

output application/json


This example outputs a Base64 encoded string. The resulting string was shortened for readability purposes:


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