A browser extension built for people who spend their day debugging tags, not writing marketing copy about them. Health checks, live tag activity, and a cookie report, all running in the actual page. Not a debug panel that resets the moment it redirects.
Same-tab redirects wipe the console and dataLayer before you can catch what just happened. Health checks and tag activity run outside the page’s own JS execution, so a redirect mid-flow doesn’t erase what was just captured.
Preview mode’s own overhead can paper over a real race condition between a tag and a redirect. A tool that watches the live page, not a debug panel, catches the version your visitors actually get.
GTM Preview and the Network tab are implementor tools, not client-facing ones. A plain pass/fail per check, in language a client can read themselves, without you narrating.
Confirming Consent Mode v2 is wired correctly and checking what’s actually set in the browser are usually two different tools, two different tabs. One popup, both answers.
Free tools are usually one of two things: a lead-gen trick, or a side project that quietly dies. This is neither.
CookieChest runs CMP, server-side tracking, and monitoring for agencies and site owners across the UK. Implementors are the people actually doing that work day to day. We built the tool we wanted for ourselves.
Still here next year. Still free.
Most days, the health check tells you what you need to know. Sometimes it doesn't.
Banner's broken? That's CMP. Data's getting lost to ad blockers before it reaches GA4? That's server-side tracking. Either way, something you can recommend without putting your own name on the invoice.
We don't officially have a referral programme yet. Send a genuine referral our way, drop us a message, and we'll be sure to share the love.
Not on the Chrome Web Store yet. Sign up and we'll send you a build to load directly, before it's public.