Last updated: 18 April 2026
The {code} Tracker Chrome extension detects when you successfully submit a LeetCode problem and automatically marks it as solved in your {code} progress tracker.
The extension reads your existing session cookie (code.sid) to authenticate requests to the {code} server. This cookie is only used to verify your identity — it is never stored, shared, or transmitted to any third party.
When you solve a LeetCode problem, the extension sends the problem's URL slug (e.g. "two-sum") to the {code} server. No other data from LeetCode or your browser is collected.
The extension stores no data locally. All progress data is stored on the {code} server under your account.
No data is sold, shared, or transferred to any third party. The extension only communicates with code-ohy1.onrender.com (the {code} server) and leetcode.com (to detect submissions).
If you have questions about this policy, reach out via the {code} app or open an issue on GitHub.