About a2zutil.dev

a2zutil.dev collects the utilities people reach for constantly — formatting a JSON response, untangling a query, converting a string, watching a webhook land — into one uncluttered site that loads instantly and asks nothing of you.

There are no accounts and no usage limits. Open a tool, use it, close the tab.

Every tool except the Webhook — the JSON formatter, SQL formatter, string & ID formatter, text transform tool and JSON ↔ CSV converter — runs entirely in your browser using client-side JavaScript. Your input is never transmitted, logged or stored anywhere. The BIN checker is a partial exception: it sends only the first 6-8 digits you enter to a third-party lookup API, directly from your browser.

The Webhook is different by necessity: it needs a real server to receive requests from the outside world. Requests delivered to your temporary URL are stored so you can inspect them, and the session expires automatically. Authorization and cookie headers are redacted on arrival, and you should only ever send test events to it.

Stay tuned.