Cookies & Ads

A cookie is a small piece of data a site stores in your browser and which the browser then sends back to a server with every subsequent request. The part that matters is that a server can read it.

Local storage sounds similar but behaves differently: it stays in the browser and is never sent to a server automatically. What this site uses to remember your settings is local storage, not cookies.

The operator sets no cookies of their own. Three values are kept in local storage instead. All of them live only on your device, are never transmitted, and disappear when you clear site data.

The cookies that do exist come from the two external services this site connects to.

Ads may appear on tool pages and guide articles. Neither ads nor analytics load inside the embeddable widget views that other sites include.

An embedded widget runs inside somebody else's blog post or teaching material. Putting advertising or visit tracking there would inject both into their page uninvited, so neither script is loaded on those views.

You can switch off personalised advertising in your Google account's Ads Settings at adssettings.google.com, and opt out of many networks at once through www.aboutads.info/choices or www.youronlinechoices.com.

Opting out does not remove advertising; it replaces personalised ads with ones that do not draw on your browsing history. In regions where consent is required, such as the EU, Google's consent tooling lets you choose whether ads are personalised.

Browser settings let you block cookies outright or delete what is already stored. In Chrome this is under Privacy and security, in Safari under Privacy, in Firefox under Privacy and Security, and in Edge under Cookies and site permissions.

Private or incognito windows discard stored values when the window closes. To block only this site, most browsers offer per-site controls behind the padlock icon in the address bar.

Blocking cookies and local storage entirely leaves every tool working, because all the computation happens in the browser regardless.

Three things change. The theme and mute settings are not remembered, so each visit starts from the defaults; the last list you entered is not kept; and any advertising shown becomes non-personalised.

If you want to check anything about cookies or advertising, email sjgwan26@gmail.com. The full picture on data handling is on the privacy policy page.