Gather JSON
Requests, API responses, records, and configuration already meet as maps, lists, strings, numbers, booleans, and null.
Language · guide · live runner
Programs shaped
like their data.
sUTL transforms maps, lists, strings, numbers, booleans, and null using transforms made from those same values. No parser, no hidden syntax—just portable, inspectable MLSNBN.
source → transform → result
{"name":"Ada"}
{"greeting":["&+","Hello, ","^$.name"]}
{"greeting":"Hello, Ada"}82executable cases
79normative decisions
44Studio examples
44core declarations
Use sUTL
Install it in JavaScript, Python, or Go.
npm install sutl-js
python -m pip install sutl-py
go get github.com/emlynoregan/sutl-go@v1.0.0Why sUTL?
A shared language for JSON-shaped systems
Transform without effects
The host performs I/O; a sUTL evaluator receives chosen values and returns a value without ambient authority.
Move behaviour between hosts
Because transforms are JSON too, JavaScript, Python, Go, and other languages can store, send, and evaluate the same program.
Try it here
Learn the language by running it.
Interactive example: transform a name into a new document.