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LEGAL & PRIVACY

Cookie Policy

Last updated: April 2026

Executive summary

Proview uses cookies and local storage to work, analyze usage and, with your consent, show ads. In short: essential ones always; analytics and advertising only if you accept them, and you can manage them at any time.

01. What are cookies?

Cookies are small text files that websites store on your device (computer, phone or tablet) when you visit them, to remember your preferences and improve your experience.

Important: cookies are NOT viruses or malicious programs. They are simple text files that cannot run code or harm your device.

02. Types of cookies

By purpose

  • Technical/essential: Basic operation of the site.
  • Analytics: Usage and performance metrics.

By duration

  • Session: Deleted when you close the browser.
  • Persistent: Remain until they expire.

By ownership

  • First-party: proview.es
  • Third-party: Google, Supabase.

Local storage

  • localStorage: Persistent data (no automatic expiry).
  • sessionStorage: Cleared when you close the tab.

03. Essential cookies

Essential

REQUIRED

Necessary for basic functionality. They cannot be disabled.

CookieProviderPurposeDuration
sb-*-auth-tokenSupabaseUser session7 days
proview_app_prefsProviewCookie preferences12 months

04. Local storage

Preferences

Your cookie and theme (light/dark) settings.

proview_app_prefs

Security (anti-spam)

Anonymous ID to prevent spam and service abuse.

proview_sid

05. Analytics cookies

Analytics (optional)

Google Tag Manager (GTM) loads on every visit to enable Consent Mode v2, but it does not set cookies or send personal data until you accept. Vercel Analytics always operates without its own cookies. GA4 only activates its cookies if you accept analytics cookies.

ProviderCookie / StorageFunctionDuration
Vercel AnalyticsNo cookiesPage metrics (no persistent identifier)—
Google Analytics 4_gaDistinguish unique users2 years
Google Analytics 4_ga_*Maintain session state per property2 years

06. Advertising and marketing

Advertising / Marketing (optional)

We show ads through Google AdSense. Google and its partners may set cookies to display ads and measure their performance. These cookies are only activated if you accept the «Marketing» category in the banner; without your consent no ad script is loaded. You can manage personalization in Google's ad settings.

ProviderCookieFunctionDuration
Google AdSense__gads / __gpiServe and measure ads, cap frequency13 months
Google AdSenseIDE / DSIDAd personalization (DoubleClick)13 months

07. Manage cookies

You can withdraw or change your consent at any time from the site's cookie banner. You can also configure your browser to block or delete cookies:

Chrome
  1. 1. Menu (⋮) → Settings
  2. 2. Privacy and security → Cookies
  3. 3. Manage cookies
Official guide
Firefox
  1. 1. Menu (≡) → Settings
  2. 2. Privacy & Security
  3. 3. Cookies and Site Data
Official guide
Safari
  1. 1. Safari → Preferences
  2. 2. Privacy
  3. 3. Manage Website Data
Official guide
Edge
  1. 1. Menu (…) → Settings
  2. 2. Cookies and site permissions
  3. 3. Manage cookies
Official guide

Consequences of blocking cookies

  • If you block essential cookies, Proview may not work correctly.
  • If you block analytics or ads, the site works normally, but we can't measure usage or show personalized advertising.

08. Controller of this policy

The full identification details of the controller (owner, tax ID and location) are available in the Legal notice.

09. Contact

Contact: info@proview.es