Cookie Policy
Last updated: March 22, 2026
1. What Are Cookies
Cookies are small text files that are placed on your device (computer, tablet, or mobile phone) when you visit a website. They are widely used to make websites function correctly, improve performance, and provide information to the site operators. Cookies can be "session" cookies, which are deleted when you close your browser, or "persistent" cookies, which remain on your device for a set period of time or until you manually delete them.
2. Cookies We Use
MasterTimeline uses cookies for authentication, essential functionality, and analytics. Analytics cookies help us understand how visitors use our site and improve the experience.
| Name | Purpose | Duration | Type |
|---|---|---|---|
| sb-*-auth-token | Supabase authentication session token. Maintains your logged-in state and authenticates API requests. | Session | Essential |
| sb-*-auth-token-code-verifier | PKCE (Proof Key for Code Exchange) verification token. Used during the OAuth authentication flow to prevent authorization code interception attacks. | Session | Essential |
| theme | Stores your preferred color scheme (dark or light mode) so it persists across sessions. | 1 year | Functional |
| _ga | Google Analytics 4. Distinguishes unique visitors to help us understand site usage patterns and improve the experience. | 2 years | Analytics |
| _ga_* | Google Analytics 4. Maintains session state to track page visits within a single browsing session. | 2 years | Analytics |
3. Third-Party Cookies
In addition to the cookies we set directly, the following third-party services may set their own cookies when you use MasterTimeline:
- Stripe: When you interact with payment forms or the subscription management portal, Stripe may set cookies for fraud prevention, bot detection, and payment security purposes. These cookies are governed by Stripe's Privacy Policy.
- Google: We use Google Tag Manager to load Google Analytics 4, which collects anonymized usage data, page views, and session information to help us improve our service. Google Analytics may also support cross-device reporting and advertising features when Google Signals is enabled. These cookies are governed by Google's Privacy Policy. You can opt out of Google Analytics by installing the Google Analytics Opt-out Browser Add-on.
- Vercel: If Vercel Analytics or Speed Insights are enabled, Vercel may set cookies to measure page performance and collect anonymized usage metrics. These cookies are governed by Vercel's Privacy Policy.
4. Managing Cookies
You can control and manage cookies through your browser settings. Most browsers allow you to:
- View which cookies are stored on your device
- Delete individual cookies or clear all cookies
- Block cookies from specific websites or all websites
- Set preferences for first-party vs. third-party cookies
- Configure notifications when a cookie is set
To manage cookies, consult the help documentation for your browser:
Important: Disabling or blocking essential cookies (specifically the Supabase authentication cookies) will prevent you from logging in to MasterTimeline and using the service. If you clear these cookies, you will need to sign in again.
5. Local Storage
In addition to cookies, MasterTimeline uses your browser's localStorage to persist application preferences and UI state. Unlike cookies, localStorage data is never sent to our servers automatically — it is accessed only by client-side code running in your browser.
| Data | Purpose | Type |
|---|---|---|
| AI generation settings | Stores your preferred AI model, image quality tier, video quality tier, and other generation preferences so they persist between sessions. | Functional |
| Timeline preferences | Stores timeline zoom level, view mode selection, and playback settings for a consistent editing experience. | Functional |
| UI state | Stores the collapsed/expanded state of sidebar sections, panel visibility, and other interface preferences. | Functional |
You can clear localStorage data for MasterTimeline by clearing your browser's site data for mastertimeline.com, or by using your browser's developer tools (Application > Local Storage).
6. Contact
If you have any questions about our use of cookies or local storage, please contact us at:
Email: support@mastertimeline.com