Free website tools
Check how any website is built and measured, and work out what your ads really cost. Free to use, no account needed.
Check any website
Paste a URL and see how the site is built and measured.
Tracker X-Ray
See every analytics tag and pixel on any website: GA4 ID, Google Tag Manager, ad pixels, session recorders and cookie banners.
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Facebook Pixel Checker
Check whether any website has a Meta (Facebook) Pixel and find its Pixel ID, even when it loads through Tag Manager.
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CMS Detector
Find out what any website is built with: WordPress, Shopify, Wix, Squarespace, Webflow and more.
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Shopify Theme Detector
See which Shopify theme any store uses, its version, and what the store renamed it to.
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WordPress Theme Detector
Find the WordPress theme, parent theme and plugins behind any WordPress site.
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Ad calculators
Fill in two numbers, get the third.
CPM Calculator
Work out cost per thousand impressions, total ad cost or impressions from the other two.
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CPC Calculator
Work out cost per click, total spend or clicks from the other two.
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CTR Calculator
Work out click-through rate, clicks or impressions from the other two.
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CPA Calculator
Work out cost per acquisition, total spend or conversions from the other two.
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ROAS Calculator
Work out return on ad spend, revenue or spend from the other two.
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Conversion Rate Calculator
Work out conversion rate, conversions or visitors from the other two.
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Got GA4 set up? Test it with real visitors.
Start with 500 free visitors. Pick a country and a traffic source, then watch the visits arrive in your GA4. Usually live in 60 minutes, always within 24 hours.