Technology Checker

Find out exactly what's powering any public page — CMS, JS/CSS frameworks, analytics, CDN, and server details.

Or try an example:

Understand every part of a site — sitewide.

A single-page check is a start. SEOJuicer's full audit checks meta tags, keywords, and more across every page on your domain, not just one URL.

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How it works

Detect any page's tech stack in three steps

No signup, no install — just paste a URL and see exactly what's running behind it.

Enter a URL

Type in any public page you want to check — no signup needed.

We inspect it live

We read the markup, scripts, and response headers for known signatures.

See the stack

Get a clear breakdown of CMS, frameworks, analytics, CDN, and server.

Know your stack before migrating

Seeing exactly what's in use makes replatforming or redesigns far less risky.

Watch for outdated software

An old CMS or plugin version publicly detectable is a common attack target.

CDN affects speed and SEO

Which CDN a site uses can explain a lot about its load times in different regions.

FAQs

Frequently asked questions

Have questions about the technology checker? Here are the most common ones our users ask before getting started.

How does a technology checker actually detect what a site uses?

It looks for known signatures in the page's HTML, script and stylesheet URLs, meta tags, and HTTP response headers — things like a wp-content folder pointing to WordPress, a googletagmanager.com script pointing to Google Tag Manager, or a Server header revealing Nginx or Cloudflare. No login or special access is needed since all of this is publicly visible to any visitor's browser.

Why would I want to know a competitor's tech stack?

Seeing what CMS, analytics, and frameworks a competitor uses can inform your own platform decisions, reveal which tools are popular in your industry, and help you understand how a site achieves certain features or performance characteristics.

Can this detect every technology on a page?

No detector can catch everything — some tools are loaded dynamically after the page renders, deliberately obfuscated, or simply don't leave a recognizable signature in the initial HTML. This checker covers the most common and widely-used CMS platforms, JS/CSS frameworks, analytics tools, and CDNs, but a clean result doesn't guarantee nothing else is running.

Is exposing my tech stack a security risk?

Revealing which software (and version) you run can make it slightly easier for an attacker to target known vulnerabilities, which is why some sites deliberately hide their Server or X-Powered-By headers. It's a minor factor compared to actually keeping software patched and up to date, but worth being aware of.

Why does SSL and doctype matter here?

SSL (HTTPS) is both a trust signal for visitors and a confirmed ranking factor, while a proper HTML5 doctype ensures browsers render the page in standards mode instead of quirks mode — both are basic technical foundations worth double-checking alongside your tech stack.

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