The StackOptic Blog
Practical guides on identifying website technologies, SEO and GEO, web performance and lead generation — from the team behind StackOptic.
How to Tell If a Website Uses Plausible Analytics
Plausible is a privacy-first, cookieless analytics tool. Detect it via the plausible.io/js/script.js library, the data-domain attribute, the window.plausible function and /api/event beacons.
How to Tell If a Website Uses Matomo
Matomo is the privacy-first, self-hostable analytics platform. Here is how to detect it on any site using script URLs, the _paq object, the matomo.php beacon and first-party cookies.
How to Tell If a Website Is Built With PrestaShop
PrestaShop is a popular open-source ecommerce platform, especially in Europe. Detect it via the prestashop global, the generator meta tag, /modules/ and /themes/ paths and PrestaShop cookies.
How to Tell If a Website Uses Google Fonts
Google Fonts is the most popular web-font service. Detect it via fonts.googleapis.com stylesheet links and fonts.gstatic.com font-file requests — and learn the GDPR implications of hosted fonts.
How to Tell If a Website Uses FullStory
FullStory records full session replays and digital-experience analytics. Detect it via the edge.fullstory.com/s/fs.js script, the global FS object, the _fs_org setting and fs_uid cookie.
How to Tell If a Website Uses Cloudinary
Cloudinary is a leading media-management and image/video CDN. Detect it via res.cloudinary.com asset URLs, the cloud name in the path and its image-transformation parameters.
How to Tell If a Website Uses Pendo
Pendo combines product analytics with in-app guidance. Detect it via the cdn.pendo.io agent, the global pendo object, pendo.initialize() and data.pendo.io tracking.
How to Tell If a Website Uses Google AdSense
Google AdSense monetises sites with display ads. Detect it via the adsbygoogle.js script from pagead2.googlesyndication.com, the adsbygoogle array, ca-pub- publisher IDs and ins.adsbygoogle blocks.
How to Do an SEO Audit (Step by Step)
A complete, step-by-step SEO audit: technical, on-page and off-page checks, the tools to use at each stage, and how to turn findings into a priority plan.
How to Tell if a Website Uses Hotjar or Another Heatmap Tool
Hotjar, Clarity, FullStory and Crazy Egg leave clear fingerprints — script domains, cookies and global objects. Here is how to detect a site's heatmap tool.
How to Write SEO-Friendly Content That Ranks
SEO-friendly content starts with intent and depth, not keywords. Place keywords naturally, structure for snippets, build E-E-A-T, and add information gain.
How to Tell if a Website Uses jQuery (and Which Version)
jQuery is easy to detect: a jquery.min.js file, the window.jQuery and $ objects in the Console, and jQuery.fn.jquery prints the exact version. Here is how.
How to Do Local SEO for Multiple Locations
Multi-location local SEO needs a page, a profile and consistent citations per location. Here is how to scale local SEO without duplicate or doorway pages.
How to Use LinkedIn for B2B Prospecting
A respectful guide to LinkedIn prospecting: optimise your profile, use Sales Navigator filters, find decision-makers, and combine it with email signals.
How to Tell if a Website Is Built with Gatsby
Gatsby leaves clear client-side tells: /page-data/ JSON requests, a ___gatsby div and app-*.js bundles. Here is how to detect this React static-site generator.
How to Make Your Website Accessible on Mobile
Mobile accessibility has its own challenges: touch targets, zoom, orientation and mobile screen readers. Here is how to make your site work on a phone.
How to Make Accessible Data Tables
Data tables only work for screen-reader users when headers are wired up correctly. Here is how to use caption, th scope, and headers/id, with code patterns.
How to Tell if a Website Is Built with WooCommerce
WooCommerce is WordPress plus Woo: woocommerce-* body classes, a /wp-content/plugins/woocommerce/ path and wc-* cart scripts. Here is how to detect it.
How to Optimize a Blog Post for SEO and AI Search (GEO)
One workflow that serves Google and AI engines at once: intent, answer-first intros, scannable structure, schema, E-E-A-T, cited stats and freshness.
How to Optimize Web Fonts for Performance
Web fonts can block rendering, hide text and cause layout shift. How to optimise them with woff2, subsetting, font-display, preloading and self-hosting.
How to Tell if a Website Uses Progressive Web App (PWA) Features
A web app manifest, a registered service worker, installability and a theme-color tag are the PWA signals. Here is how to detect them in Chrome DevTools.
How to Optimize Images for SEO
Image SEO goes beyond speed: filenames, alt text, captions, image sitemaps, structured data and crawlable lazy-loading for Google Images and rich results.
How to Tell if a Website Uses Akamai, Fastly, or CloudFront
Each major CDN leaves distinct header fingerprints — Fastly's x-served-by, Akamai's ghost markers, CloudFront's x-amz-cf-pop. Here is how to tell them apart.
How to Optimize for Voice Search
Voice queries are longer, conversational and often local. How to optimise with natural-language Q&A, FAQ schema, snippet alignment, fast pages and local SEO.