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JSON Contract Drift

Parser

Ignore paths

Array identityUnordered arrays

Number ±

No network payload

Baseline⌘1375 B · JSON

Candidate⌘2418 B · JSON

ResultReady

Run the current tool with ⌘↵. The payload stays inside the local worker.

Compare · PROCESSED LOCALLY

What JSON Contract Drift does

Compare a baseline and candidate payload and classify additive, warning, and breaking structural drift locally.

Also searched as contract, drift, breaking change, compatibility, api change, regression, backward compatible, schema drift.

Compare observed shapes

Classify removals and type changes

Return an explainable compatibility summary

This release performs deterministic compatibility analysis in the browser. Hosted history, teams, and a registry remain deliberately deferred.

QUESTIONS, ANSWERED

Does jsontools.me upload my JSON?

No. The document is parsed and processed by json-buf inside a dedicated WebAssembly worker on your device.

Does it work offline?

Yes. After the application shell and engine have loaded once, the installable PWA keeps the tools available without a network connection.