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.

toHex(Number): String

Transforms a decimal number into a hexadecimal number.

Introduced in DataWeave 2.2.0. Supported by Mule 4.2 and later.


Name Description


The input number.


This example shows how toHex behaves with different inputs.


%dw 2.0
import toHex from dw::core::Numbers
output application/json
    a: toHex(-1),
    b: toHex(100000000000000000000000000000000000000000000000000000000000000),
    c: toHex(0),
    d: toHex(null),
    e: toHex(15),


  "a": "-1",
  "b": "3e3aeb4ae1383562f4b82261d969f7ac94ca4000000000000000",
  "c": "0",
  "d": null,
  "e": "f"

toHex(Null): Null

Helper function to make toHex work with null value.

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