RulesJSON to Jsonnet emits idiomatic style (unquoted valid keys, trailing commas). Jsonnet to JSON evaluates with the official sjsonnet engine locally in your browser — local bindings, functions, comprehensions and the std library are supported; import and extVar are not.

JSON

Load some data to start

Jsonnet

Load data and the result will appear here

The config language of K8s & Grafana

JSON to Jsonnet Converter

Two-way conversion · official sjsonnet evaluator · locals / functions / comprehensions · runs locally

🔒Data is processed locally in your browser — never uploaded or stored

No upload, no storage

JSON is processed in memory and never sent to a server.

Share via URL fragment

Share links encode data in the # anchor — never sent to a server.

Remember last edit

Optionally keep your last input locally; clear it with one click.

Why use this JSON to Jsonnet converter

A real evaluator, not a toy

Jsonnet to JSON runs the official sjsonnet (Scala.js build) in your browser — local bindings, functions, comprehensions and the std library evaluate per the language spec.

Two-way conversion

Turn existing JSON configs into idiomatic Jsonnet as a template starting point; evaluate hand-written Jsonnet on the spot to verify its output.

Idiomatic output

Valid keys go unquoted, reserved words get quotes automatically, trailing commas throughout — the output follows community conventions.

Engine loads on demand

The evaluator downloads only when you use Jsonnet to JSON, so the page opens fast; once loaded, switching is instant.

Local & private

Infrastructure configs carry internal details — everything evaluates on your machine, nothing uploaded.