Cookie Policy
Last updated: August 31, 2026
What Are Cookies?
Cookies are small text files that websites store on your device to remember information about your visit. They help websites function properly and can improve your experience.
Cookies We Use
Decklist uses essential cookies required for the service to function. Optional cookieless product analytics and advertising cookies for non-premium users load only with your consent.
| Name | Type | Purpose | Duration |
|---|---|---|---|
session_id |
Essential cookie | Authentication. A signed, httpOnly cookie with SameSite=Lax that keeps you logged in. Required for the service to function. | Expires after 2 weeks of inactivity |
cookie_consent |
localStorage (not a cookie) | Stores your versioned optional analytics and advertising consent preference so the banner does not reappear. Older advertising-only choices are not reused for analytics. | Persistent until cleared |
Cookieless Product Analytics
If you choose “Accept all,” Decklist loads our self-hosted Umami analytics. Umami does not set tracking cookies. Before delivery, Decklist replaces URLs and titles with generic page categories, removes query strings, referrers, content identifiers, and identity payloads, and restricts custom events to low-cardinality fields such as game, format, action outcome, and safe reason codes. We do not send card or deck names, imported lists, search text, email addresses, or usernames. Choosing “Essential only” keeps Umami disabled.
Advertising Cookies
For non-premium users, Decklist displays ads through Google AdSense. Google AdSense may set cookies to serve and measure display ads. These cookies include:
| Category | Purpose | Consent Required |
|---|---|---|
ad_storage |
Stores information related to advertising, such as which ads have been shown. | Yes |
ad_user_data |
Sends user data to Google for advertising purposes. | Yes |
ad_personalization |
Enables personalized advertising based on user behavior. | Yes |
You can decline advertising cookies via the cookie consent banner. If you decline, ads will still be shown but they will be non-personalized. Premium users are not shown ads and no advertising cookies are set for them.
Google Consent Mode v2
We use Google Consent Mode v2 to manage advertising cookie consent. By default, all advertising cookies are denied until you explicitly accept them via the cookie consent banner. This ensures compliance with GDPR and similar regulations.
Error Monitoring
We self-host GlitchTip for error monitoring. It does not set tracking cookies and remains active as an essential operational security and reliability service. Request parameters and default personally identifiable information are disabled.
TCGPlayer
When you click a card price link on Decklist, you are taken to TCGplayer's website. These are not affiliate links. TCGPlayer may set its own cookies according to their own privacy and cookie policies. We have no control over cookies set by third-party websites.
Managing Cookies
You can manage and delete cookies through your browser settings. Most browsers allow you to block or delete cookies. Please note that deleting the session_id cookie will log you out of Decklist.
To change your choice, remove the cookie_consent item from your browser's localStorage and reload Decklist. The consent banner will appear again.
Changes to This Policy
We may update this cookie policy if we change how we use cookies. The "Last updated" date at the top of this page indicates when the policy was last revised.
Contact
If you have questions about our use of cookies, please visit our Contact page.