Plain-language policy · effective 28 August 2026

Privacy

Parameter Playground is local-first. You can use every model without an account, analytics identifier, or server-side lesson database.

What stays on your device

The lesson title, prompt, chart description, model parameters, and seed are saved in your browser’s local storage so your draft survives a refresh. Learner prediction and explanation text remains only in the current page and is not stored. You can erase the saved draft by clearing site data in your browser.

What a shared link contains

When you copy a lesson link, its lesson settings are encoded directly in the URL. Anyone you give the URL to can read those settings. Do not put student names, private class information, or sensitive information in lesson fields.

Network and offline use

The host necessarily receives ordinary web request information such as IP address, time, and requested file in short-lived infrastructure logs. The app does not add analytics, advertising, tracking pixels, or third-party scripts. A service worker caches the app on your device for offline use.

Questions

Open an issue in the public source repository for privacy questions or deletion guidance.