Small, useful utilities we built along the way. Privacy-friendly, no signup, no tracking gimmicks — the calculators run entirely in your browser.
Enter any public page and see the third-party trackers, ad pixels, and session recorders it loads — and which of them set cookies. (This one fetches the page from our server, once; we don't store its contents.)
Scan a site →Visitors and conversions in, verdict out: conversion rates, relative lift, and a two-tailed p-value — with honest guidance about peeking and small samples.
Check your test →Compose campaign URLs with UTM parameters and get instant warnings for the tagging mistakes that quietly wreck attribution reports.
Open the UTM builder →Generate sha256/sha384/sha512 Subresource Integrity hashes for scripts and stylesheets, plus a ready-to-paste integrity snippet.
Open the SRI generator →Turn average page weight and monthly pageviews into a rough, honest order-of-magnitude CO₂e estimate for your site's data transfer.
Open the carbon estimator →Built by the team behind Tracely, the privacy-first web analytics platform. The calculators never send what you type anywhere; the scanner sends only the URL you ask us to fetch.