Use the Tech Stack Detector
Enter any public URL and this tool fetches the live page and its response headers, then scans for real technology signals — CMS platform, JavaScript framework, backend language, CDN
- Free to use
- No signup
- Nothing to install
- Works in any modern browser
Scanning a site detects WordPress as the CMS (high confidence via meta generator tag and wp-content paths), Cloudflare as the CDN (via response headers), and Google Analytics 4 (via the gtag script) — all in one pass.Open the Tech Stack Detector
Illustration. Open the tool for the real thing.
What is the Tech Stack Detector?
Enter any public URL and this tool fetches the live page and its response headers, then scans for real technology signals — CMS platform, JavaScript framework, backend language, CDN provider, analytics tools and common plugins — matching each against a signature database and returning a confidence score for every technology it detects.
This works the same general way tools like Wappalyzer do: matching known script paths, header values, HTML patterns and cookie names against a signature database, rather than guessing — free, with no browser extension or account required.
3 steps to your result
Open the tool and follow along. Nothing to install.
What you get
Scans HTML, response headers and script patterns together for stronger, more accurate signals.
Every detected technology comes with a confidence score, not just a flat yes/no guess.
Detects CMS, JS framework, backend language, CDN, analytics platform and plugins in one scan.
Runs entirely from a pasted URL — no signup, no browser install.
AZRS tools are free to open and use.
It opens in your browser, so there is nothing to download.
Used for
Pick one to see how it fits.
Marketers researching competitors
See what CMS, analytics and marketing tools a competitor's site actually runs on.
Try it freeDevelopers evaluating a potential vendor or partner site
Get a fast read on a site's technical stack before a partnership or integration conversation.
Try it freeAgencies scoping new client work
Quickly understand what a prospective client's site is already built on before quoting a rebuild or migration.
Try it freeHow it compares
A plain look at this tool next to the usual alternative.
| This seo tool | Desktop software | |
|---|---|---|
| Install | Nothing to install | Usually an app or program to install |
| Account | No signup | Depends on the product |
| Cost | Free to use | Free or paid, depends on the product |
Questions people ask
Is this similar to Wappalyzer?
Yes — it detects technology using the same general approach (matching HTML, header and script signatures against a database), and it's completely free with no account or browser extension required.
What categories of technology does it detect?
CMS platform, JavaScript framework, backend language, CDN provider, analytics tools and common plugins, each with its own confidence score.
Can I check competitor websites?
Yes — enter any public website URL to see what technologies power its infrastructure and marketing stack.
How accurate is the confidence score?
It reflects how many distinct signals (headers, HTML patterns, script paths) matched a technology's signature — more matching signals mean higher confidence, but it's still an inference, not a guarantee.
Does it work on password-protected or staging sites?
No — it can only analyze what's publicly reachable at the URL you enter, the same as any visitor's browser would see.
More free tools
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Try the Tech Stack Detector now
Enter any public URL and this tool fetches the live page and its response headers, then. Free to use.
Try it free