Privacy Policy — Notion Diff

Last updated: April 12, 2026

Overview

Notion Diff ("the extension") is designed with your privacy in mind. This policy explains what data the extension accesses, stores, and transmits.

The extension only accesses data when you explicitly trigger a comparison.

Data	Purpose	When
Notion page content	Rendering the diff	On comparison only
`token_v2` cookie (notion.so)	Session authentication	On comparison only
Notion integration API key	API key authentication (if entered by user)	On setup and comparison

The following data is stored on your device only (chrome.storage.local) and is never transmitted to any third party.

API key — Stored in obfuscated form. Never sent anywhere except Notion's servers.
Snapshots — Copies of Notion page content saved by you.
Theme preference — Light or dark mode setting.
License information — Pro license key and cached validation result.

No user data is transmitted to any third party.

The extension communicates only with the following endpoints:

Destination	Purpose	Condition
`api.notion.com`	Notion official API (page retrieval)	API key auth, on comparison
`www.notion.so`	Notion internal API (session auth, version history)	Session auth, on comparison
License validation endpoint	Verify Pro license key	Pro license only, at most once per 24 hours