Cookie Policy | Bobek Tools

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Bobek uses one essential session cookie and optional browser storage for useful preferences. Google AdSense may use additional technologies according to your location and consent choices.

Last updated: 23 July 2026

What cookies and local storage are

Cookies are small values a website can ask your browser to retain. Local storage is a similar browser feature commonly used for preferences and saved items. Both are tied to the browser and device you use.

Essential Bobek cookie

Name	Purpose	Typical duration
`BOBEKQR`	Maintains a secure session, protects server forms against forged requests, and supports short-term abuse prevention.	Browser session; associated server data is short-lived.

This cookie is necessary for security and server-backed features. It is marked HttpOnly and SameSite Strict, and is marked Secure when the site is served over HTTPS. It is not used to follow you across websites.

Preferences stored in your browser

The following information may be stored locally when you use the relevant feature:

Storage	What it remembers
`bobek-theme`	Your light or dark appearance choice.
`bobek-color-history`	Recently selected colours.
`bobek-emoji-*`	Emoji favourites, recent emoji and preferred skin tone.
`bobek-unit-*`	Favourite unit conversions and recent conversion history.
`bobek-timezone-*`	Saved comparison cities and 12- or 24-hour clock preference.

These preferences stay in your browser and are not uploaded to a Bobek account. Local storage normally remains until you clear the site’s data or the application removes it.

Google advertising technologies

Bobek Tools uses Google AdSense. Google and participating advertising partners may use cookies, local storage or similar technologies to deliver and measure ads, prevent fraud, limit repetition and, where permitted, personalise advertising.

The exact cookies can vary according to your region, browser, Google account, consent choices and the advertising partners involved. Google explains its advertising technologies in How Google uses cookies in advertising and its Privacy Policy.

How to control stored information

Use your browser settings to view or delete cookies and site data for bobek.co.uk.
Block optional third-party cookies through your browser if you prefer.
Use the choices supplied by Google’s consent message where it is available.
Remember that clearing site data also removes Bobek preferences such as favourites, history and theme.

Blocking the essential session cookie may prevent QR generation and image-by-URL features from working correctly. The browser-only tools should continue to work, although their preferences may not be remembered.

Changes to this policy

This Cookie Policy may be updated when storage features, advertising partners or legal requirements change. The latest version and revision date will be available on this page.