Fantrax Dynasty Tools

Privacy Policy

Effective August 19, 2026

Fantrax Dynasty Tools is a local-first browser extension. It does not operate a developer-controlled backend, create user accounts, collect analytics, show advertising, or sell personal information.

Data used by the extension

When the extension runs on Fantrax, it reads the current league identifier and requests read-only league information, teams, rosters, standings, draft picks, draft results, transaction history, contract and cap information, and projections directly from Fantrax. The league identifier is sent only to Fantrax as required to make those requests.

The extension downloads public NFL statistics and player-identity data from GitHub-hosted nflverse releases. These requests do not include Fantrax league, team, roster, or player-selection information.

If the user explicitly enables FantasyCalc values, the extension sends only the derived value profile needed for the request—dynasty format, quarterback count, team count, and PPR setting—to FantasyCalc. It does not send the Fantrax league identifier, team names, rosters, or draft-pick ownership to FantasyCalc.

If the user imports an IDP CSV overlay, that file is parsed and stored locally. Its contents are never uploaded by the extension.

Like ordinary web requests, requests to Fantrax, FantasyCalc, GitHub, and their hosting infrastructure expose standard network information such as the user's IP address to those providers. Their handling of that information is governed by their own privacy policies.

Storage and deletion

League data, provider results, settings, and optional CSV values are stored in the browser's local extension storage. The developer cannot access that storage. Users can delete this information by removing the extension or clearing its locally stored extension data through their browser.

The extension does not read or store Fantrax cookies or credentials. For transaction history, the browser attaches the user's existing Fantrax session to a read-only Fantrax request in the same way it does for the native Transactions page. Diagnostic information remains local unless the user manually copies or exports it.

Limited use and disclosure

Information handled by Fantrax Dynasty Tools is used only to provide and improve its disclosed purpose: dynasty-football analysis on Fantrax league pages. It is not sold, transferred for advertising, used for unrelated purposes, used to determine creditworthiness, or made available for human review by the developer. Data is sent only to the providers described above and only when necessary to provide the extension's requested features. Fantrax Dynasty Tools complies with the Chrome Web Store User Data Policy, including its Limited Use requirements.

Independence

Fantrax Dynasty Tools is independent and is not affiliated with or endorsed by Fantrax, FantasyCalc, GitHub, or nflverse.

Contact

Privacy or security questions may be submitted through the project's GitHub Issues page.