Try it now
Paste your input, write a transformation, and watch the output update live as you type. It runs entirely in your browser, free, with no signup.
What you can test
- •Core operators: map, filter, reduce, groupBy, mapObject, and more
- •Error handlers, using() scoping, format strings, and type coercions
- •Input and output across JSON, XML, CSV, YAML, and plain text
- •Live execution timing — every run reports its real time in milliseconds
The same engine that runs your migration
The Playground isn't a stripped-down demo. It runs the exact Transmute engine that executes DataWeave in the Spring Boot apps API Modernizer produces — so a transformation that works here is a transformation that works in your converted application.
What DataWeave-compatible means
Transmute is a DataWeave-compatible engine — it implements the DataWeave transformation surface in native Java. It is not MuleSoft's official DataWeave product, and this Playground is not affiliated with MuleSoft. We say DataWeave-compatible precisely so you know what to expect: the same operators and semantics, running on the JVM.