Last updated: 19 September 2026
This lists every cookie our public site and app set, and the browser storage the pages of www.decarbonpro.com use, with what each one does. We built it by opening the site in a fresh browser and recording what was stored before any choice, after Accept, after Decline and after changing the choice. Inside the signed-in app your browser also keeps working choices, such as a pinned sidebar or a guide you dismissed, in its own storage.
These are needed for something you asked for, like staying signed in, or hold no identifier. Our own visit counts use browser storage that is forgotten when the tab closes, and nothing at all is counted if your browser sends Do Not Track or Global Privacy Control.
| Name | Type | Set by | Where | What it does | How long |
|---|---|---|---|---|---|
| sb-*-auth-token* | cookie | Us (through Supabase, our sign-in provider) | app.decarbonpro.com | Keeps you signed in to the app. It is set when you sign in, and during a sign-up or password reset.Not seen in our browser recording, because it needs a signed-in account or a locked share page. Its name and lifetime come from our code and the sign-in library it uses. | Until you sign out, and at most 400 days |
| sp_unlock_* | cookie | Us | A password-protected share page you unlock | Remembers that you entered the right password for that one page.Not seen in our browser recording, because it needs a signed-in account or a locked share page. Its name and lifetime come from our code and the sign-in library it uses. | 1 day |
| dcp-sid | browser storage | Us | www.decarbonpro.com (this tab only) | A random number for our own visit counts, so pages opened in one tab count as one visit. Not sent if your browser sends Do Not Track or Global Privacy Control. | Until you close the tab |
| dcp-utm | browser storage | Us | www.decarbonpro.com (this tab only) | The campaign tags in the link you arrived by, so later counts in the same tab carry them. | Until you close the tab |
| dcp-consent-clarity | browser storage | Us | www.decarbonpro.com | Remembers whether you accepted or declined Microsoft Clarity, so the banner does not ask again. | Until you change it from the footer or clear this site’s data |
| cbam_session | browser storage | Us | www.decarbonpro.com (this tab only) | Links the free calculator to the inputs it saved, so a reload does not start over. | Until you close the tab |
| cbam_session_anonymous | browser storage | Us | www.decarbonpro.com (this tab only) | Marks a calculator session started without an email address. | Until you close the tab |
Microsoft Clarity shows us how the public site is used, so we can see where it is hard to use. It loads only after you press Accept on the banner, and never inside the signed-in app. Text you type is masked before it leaves your browser.
| Name | Type | Set by | Where | What it does | How long |
|---|---|---|---|---|---|
| _clck | cookie | Microsoft Clarity | decarbonpro.com | Keeps the Clarity user ID and preferences for this site. | 1 year |
| _clsk | cookie | Microsoft Clarity | decarbonpro.com | Joins the pages you open into one Clarity recording. | 1 day |
| _cltk | browser storage | Microsoft Clarity | www.decarbonpro.com (this tab only) | Clarity’s working value for the current tab. | Until you close the tab |
| CLID | cookie | Microsoft Clarity | www.clarity.ms | Records the first time Clarity saw this browser on any site that uses Clarity. | 1 year |
| MUID | cookie | Microsoft | clarity.ms and bing.com | Identifies a browser across Microsoft sites. Microsoft says it is used for advertising, site analytics and other operational purposes. | 390 days |
| MR | cookie | Microsoft | c.clarity.ms and c.bing.com | Tells Microsoft whether to refresh MUID. | 7 days |
| SM | cookie | Microsoft | c.clarity.ms | Keeps MUID in step across Microsoft domains. | Until you close the browser |
| ANONCHK | cookie | Microsoft | c.clarity.ms | Microsoft says Clarity always sets it to 0, because Clarity does not use the advertising ID it refers to. | 10 minutes |
| SRM_B | cookie | Microsoft | c.bing.com | Set by Microsoft when Clarity loads. Microsoft’s Clarity cookie list does not describe it. | 390 days |
Use “Cookie settings” at the bottom of any page on the public site. If you decline after accepting, we tell Clarity to stop, delete the Clarity cookies on our own domain and reload the page, and Clarity does not load again. Cookies Microsoft set on its own domains (clarity.ms and bing.com) can only be removed from your browser’s settings; once you decline, our site no longer loads anything that uses them.
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