A cookie is a small text file that a website stores in your browser so that it can recognise the browser on later requests. This page lists the cookies you may encounter on periotable.com and explains how to control them. It complements the privacy policy.
Cookies set by the site itself
None. periotable.com sets no cookies of its own: it has no accounts, no preferences to remember and no analytics script. The quizzes and calculators keep their state on the page only, and forget it when you leave.
Strictly necessary cookies from our host
The site is served by Cloudflare, which may set a small number of cookies needed to deliver the site securely and to tell people from automated traffic — for example __cf_bm, which expires after about 30 minutes. These cookies contain no personal information and cannot be disabled without preventing the site from working, which is why no consent is asked for them.
Advertising cookies (Google AdSense)
Advertisements on the site are served by Google AdSense. When an ad is shown, Google and, in some cases, its advertising partners may set cookies such as:
| Cookie | Set by | Purpose | Duration |
|---|---|---|---|
IDE | doubleclick.net | Serving and measuring ads, limiting how often you see the same one | up to 13 months |
test_cookie | doubleclick.net | Checks whether the browser accepts cookies | 15 minutes |
NID | google.com | Ad preferences and personalisation | 6 months |
The exact list varies with the ads that are shown and your region. Google describes its cookies and how it uses the data at policies.google.com/technologies/cookies and policies.google.com/technologies/partner-sites.
Your choices
- Consent message. Where the law requires it, a message asks for your consent before personalised advertising cookies are set. If you refuse, ads are still shown, but they are not personalised and no advertising cookie is used to build a profile of you. You can change your choice at any time through that tool or the settings below.
- Google settings. Turn off personalised advertising for your Google account or browser at adssettings.google.com.
- Industry opt-outs. Opt out from participating vendors at aboutads.info/choices (United States) or youronlinechoices.eu (Europe).
- Your browser. Every browser lets you view, block and delete cookies, for all sites or for particular ones. Blocking all cookies does not affect the site’s own features, since it uses none. Instructions: Chrome, Firefox, Safari, Edge.
Changes
This page is updated whenever the cookies used on the site change. The date at the top shows the last revision.
Questions: contact@periotable.com.