Eventloupe

A magnifier for tracking events. See every pixel, tag and dataLayer push a page fires, what was sent, and what was observed.

Eventloupe is a Chrome DevTools panel that shows what your page really sends. Open DevTools, choose the Eventloupe tab, and every pixel, tag and dataLayer push the page fires appears in one timeline: what was sent, what was observed, and what to fix. "Fired" is not the same as "delivered". Eventloupe traces each event through six stages (Application, Tag Manager, SDK call, Network, Response, Correlation) and marks every stage observed, failed or unknown. It never guesses: if it could not see something, it says unknown instead of pretending it worked. WHAT YOU GET • One timeline for your tracking setup: the dataLayer, Google's tools, the major social and advertising pixels, and common analytics and tag-management tools. The full list of supported platforms is on our website. • Validation against each platform's published requirements, with stable diagnostic codes (EL1000 to EL9999) and a suggested fix for every finding. • Health scores for coverage, parameter quality and identity, with an A to F grade, so you know what to fix first. • Ecommerce funnel across platforms: which platform dropped off, and at which step. • Consent view: CMP detection, the Consent Mode default and update timeline, and what each platform received. • Attribution timeline: every time a visitor entered the site while you were recording, what the landing URL said (UTM parameters, ad click IDs), and whether those parameters reached GA4. It flags redirects that strip them, new sessions after a return from a payment provider, self-referral, and cross-domain hops without the linker. • Session summary, filters, a Smart Filter that hides SDK noise, and Marketer and Advanced views. • Custom alert rules, for example "GA4 purchase must have transaction_id". • Export as JSON or CSV, or an HTML audit report you can send to a client. • Test Mode: press Test and Eventloupe clicks through the funnel of the site you are debugging (listing page, product page, add to cart, checkout) and checks the tracking at each step. It adds a product to the cart, never submits a payment, and runs only when you start it. Use it on your own store or a staging site. PRIVATE BY DESIGN • Everything stays in your browser. No servers, no accounts, no analytics or telemetry. • Captured events are kept in your browser only, and Clear removes them. The privacy policy lists exactly what is stored and where. • Sensitive values are handled with care: identifiers passed to session-replay tools are masked, and e-mail addresses and phone numbers sent to advertising platforms are not recorded. • Eventloupe is built to observe, not interfere: it does not block requests or change what they contain. WHO IT IS FOR Analysts and marketers checking a tracking implementation, developers debugging tag manager configurations, QA teams validating ecommerce tracking, and agencies auditing a client's site. Eventloupe is an independent tool and is not affiliated with or endorsed by Google, Meta, Microsoft or any other platform it can read. All product names are trademarks of their owners.