1. What Are Cookies and Local Storage?
Cookies are tiny text files stored in your web browser by websites you visit. They allow websites to remember user actions, retain login sessions, and optimize site performance.
In addition to traditional HTTP cookies, WebToolOcean PDF Studio uses modern browser storage mechanisms, such as localStorage and IndexedDB. Because PDF Studio operates on a client-side architecture, your documents, temporary edit states, and custom signature drawings are stored directly inside your browser's private memory sandbox rather than on external cloud servers.
2. Categories of Cookies We Use
A. Strictly Necessary / Essential Cookies
These cookies are necessary for the website to function properly. They handle authentication sessions (via Google OAuth), security protections against CSRF/XSS attacks, and basic document workspace navigation. The website cannot function without these items.
B. Functional & Preference Cookies
Functional cookies allow us to remember choices you make, such as your preferred UI theme (dark mode or light mode), your active PDF zoom level, or your most recently used font selections in the editor.
C. Performance & Analytics Cookies
These cookies collect aggregated, anonymous statistics about how visitors interact with our pages (such as which PDF conversion tools are used most frequently). This information allows us to optimize loading speeds, diagnose client errors, and improve tool responsiveness.
D. Third-Party Advertising Cookies (Google AdSense)
We may partner with third-party advertising networks, primarily Google AdSense, to display advertisements on our website. These third-party vendors use cookies to serve ads based on your previous visits to this website or other sites on the internet.
3. Google AdSense & The DoubleClick DART Cookie
Google is a third-party vendor on our site. Google uses cookies, specifically the DoubleClick DART cookie, to serve targeted advertisements to our users based on their visits to pdf.webtoolocean.com and other destinations across the web.
Users may opt out of personalized advertising by visiting Google Ads Settings .
Alternatively, you can opt out of a third-party vendor's use of cookies for personalized advertising by visiting aboutads.info or the Network Advertising Initiative Opt-Out .
4. Cookie Inventory & Storage Breakdown
| Item / Cookie | Provider | Purpose | Category | Duration |
|---|---|---|---|---|
| pdf_workspace_state | WebToolOcean | Stores active document edits locally in your browser memory | Essential | Session |
| firebase_auth_token | Google Firebase | Secure authentication state for Google Single Sign-On | Essential | Persistent (until sign-out) |
| theme_preference | WebToolOcean | Remembers Dark / Light mode UI preference | Functional | 1 Year |
| cookie_consent | WebToolOcean | Stores your cookie preferences & consent choices | Essential | 1 Year |
| __gads, __gpi, IDE | Google AdSense / DoubleClick | Provides ad serving, fraud prevention, and performance metrics | Advertising | 13 Months |
5. How to Control and Manage Cookies in Your Browser
You can prevent the setting of cookies or delete existing cookies through your browser settings. Please note that disabling essential cookies may impact certain interactive features such as cloud document persistence.
6. Updates to This Cookie Policy
We may periodically update this Cookie Policy to reflect changes in our operational technologies or applicable privacy regulations. We encourage you to review this page occasionally. For any questions regarding our cookies or data handling, reach out at privacy@webtoolocean.com or visit our Contact Support page.