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DevUtil

Theme & Technology Detector - Identify Any Stack

Detect the Theme and Technology Behind Any Website

Curious what theme or CMS a website is running? Paste any URL into this tool and it will fetch the page, scan the HTML source and HTTP response headers, and match over 40 technology signatures across nine categories. You get the CMS, theme name, front-end framework, analytics tools, and server stack in seconds.

Shopify Theme Detection

The detector identifies Shopify stores by matching references to cdn.shopify.com, the Shopify.theme JavaScript object, and Shopify-specific headers like X-ShopId. When a Shopify theme name is present in the page source, the tool extracts it and displays it alongside the detection result. That means you can see whether a store runs Dawn, Prestige, Impulse, or any custom theme.

This is useful for store owners researching competitor themes, agencies scoping out a new client's setup, or developers looking for theme inspiration. You can also check whether a store uses Shopify Plus by looking at the server headers and CDN configuration in the results.

WordPress Theme Detection

WordPress sites are detected through wp-content and wp-includes paths, the generator meta tag, and the WordPress REST API endpoint. The detector extracts the active theme slug from wp-content/themes/ paths in the HTML and reads the WordPress version number from the generator tag when available.

Knowing which WordPress theme a site uses helps with competitive research, client handovers, and finding themes that match a design you like. The version number is also useful for security audits, since outdated WordPress versions may have known vulnerabilities.

For a deeper look at platform-specific detection, see the dedicated Shopify Theme Detector and WordPress Theme Detector pages.

Other CMS and Frameworks

Beyond WordPress and Shopify, the tool detects Squarespace, Wix, Webflow, Drupal, Joomla, and Ghost. It also identifies front-end frameworks like React, Next.js, Vue, Nuxt, Angular, Svelte, Astro, and Gatsby. CSS frameworks (Bootstrap, Tailwind CSS), analytics platforms (Google Analytics, Hotjar, Plausible), font services, CDN providers, and hosting platforms are all covered.

How to Use

Paste or type a URL into the input field and click Analyse. The tool fetches the page through a server-side proxy, runs the detection engine, and groups the results by category. Each detected technology shows a confidence level and, where possible, the version number or theme name.

Use Cases

  • Competitive research. See what themes and technologies your competitors use for their websites and online stores.
  • Client audits. Quickly understand the tech stack of a client site before starting a project or migration.
  • Theme shopping. Found a site with a design you like? Identify the exact theme so you can use it yourself.
  • Security assessments. Identify server software and CMS versions that may have known vulnerabilities.

Related Tools

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Inspect HTTP response headers for any URL with a security audit checklist.

Redirect Checker

Trace the full redirect chain for any URL with status codes and timing.

Frequently Asked Questions

How does the theme detector work?
The detector fetches the HTML and HTTP response headers of the URL you enter, then matches them against a library of patterns for over 40 technologies. It looks for CMS-specific file paths, framework signatures in the markup, analytics script URLs, and server headers to identify what a site is built with.
Can it detect Shopify themes?
Yes. The detector identifies Shopify stores by looking for cdn.shopify.com references, the Shopify.theme JavaScript object, and Shopify-specific response headers (X-ShopId, X-ShardId). It also extracts the theme name from the Shopify.theme object, so you can see whether a store uses Dawn, Debut, Prestige, or any other theme.
Can it detect WordPress themes?
Yes. WordPress sites are identified by their wp-content and wp-includes paths, the WordPress generator meta tag, and the REST API endpoint. The detector also reads the active theme slug from wp-content/themes/ paths in the HTML and extracts the WordPress version number when available.
What other technologies can it detect?
Beyond WordPress and Shopify, the detector identifies Squarespace, Wix, Webflow, Drupal, Joomla, and Ghost. It also detects front-end frameworks (React, Next.js, Vue, Nuxt, Angular, Svelte, Astro, Gatsby), CSS frameworks (Bootstrap, Tailwind CSS), analytics (GA4, GTM, Facebook Pixel, Hotjar, Plausible, Fathom), font services, CDN providers, hosting platforms, and server software.
Why does it show a confidence level?
Some patterns are highly specific, like the WordPress wp-content path, while others could match multiple technologies. The confidence level (high or medium) tells you how reliable each detection is. A high-confidence result means the pattern is unique to that technology.
Is my data stored when I use this tool?
No. The server fetches the URL you provide, runs the detection patterns, and returns the results. We do not log the URLs you enter or the results. The fetched HTML is discarded immediately after analysis.