Website Technology Checker
Find out what any website is built with: its programming language, frameworks, CMS or shop platform, database, web server and operating system, hosting, CDN, DNS and email provider, analytics and more.
Enter a website address
We scan the page, its JavaScript and CSS files, the domain's DNS and email records and its SSL certificate. This takes a few seconds.
Safe by design
Scripts in pages you load or paste never run, and nothing is stored.
Fast, no sign-up
No account and no daily limit for normal use.
Built for developers
Made for scraping, testing, SEO checks and front-end work.
How the technology checker works
When you enter an address, our server loads the page the way a browser would and looks at everything it reveals: the response headers, the cookies it sets, its meta tags and HTML, and the contents of up to 14 of its JavaScript and CSS files, where libraries leave their names and version numbers. It also reads the domain's public DNS records (mail servers, name servers, SPF, DMARC and verification records) and the site's SSL certificate. More than 500 technology fingerprints are matched against all of this.
Every result shows its evidence and a confidence level. Confirmed means it was seen directly, for example in a header, a script file or a DNS record. Likely means it matched a pattern in the HTML. Inferred means another technology gives it away: WordPress always runs on PHP with a MySQL database, and Odoo on Python and PostgreSQL.
Databases are never exposed directly by a well-run site, so they appear when the platform implies them or the site's code talks to a hosted database such as Firebase or Supabase. The checker doesn't run the page's JavaScript or log in, so apps that build everything in the browser, or sites that hide their server details, show fewer results. Nothing you check is saved.
How to use it
- 1Type or paste a website address, for example example.com.
- 2Press Check website and wait a few seconds while the page, its files, DNS and certificate are checked.
- 3Read the stack at a glance: language, framework, database, CMS, web server, hosting, operating system and email provider.
- 4Filter the full list by layer or search it, and open any result to see the exact evidence.
- 5Copy the list or download it as CSV or JSON.
What Our Users Say
Real feedback from people using WeblixTools, checked by our team before it appears.
Frequently Asked Questions
How accurate is the website technology checker?
It's reliable for technologies that leave clear traces, such as WordPress, Shopify, Next.js, Google Analytics or Cloudflare, and every result shows its evidence and a confidence level (confirmed, likely or inferred). It can miss tools that load only after the page runs its JavaScript, and it can't see back-end details a site keeps private.
Does the site I check find out?
The site sees a normal page visit from our server, plus requests for some of the script and style files that page loads, like any visitor's browser. DNS records are public and looked up through ordinary DNS. We don't log in, click anything or open other pages.
Do you store the websites I check?
No. The page is fetched, analysed and discarded straight away. We only keep a short-lived counter of requests per visitor to stop abuse.
Why does it say "inferred" next to some results?
Some technologies give away others. WordPress always runs on PHP with MySQL, and Next.js on React and Node.js, so those are listed as inferred even when the site doesn't mention them directly. Inferred items are shown with a dashed border.
Can it find out which database a website uses?
Sometimes. Databases sit behind the web server and are never sent to visitors, so the checker infers them from the platform (WordPress, Magento and Joomla use MySQL; Odoo, Discourse and Supabase use PostgreSQL), spots hosted databases such as Firebase or Supabase in the site's code, or catches database error messages a site leaks. When none of that applies it shows "Not visible".
How does it find the programming language?
From headers such as X-Powered-By, session cookies (PHPSESSID means PHP, JSESSIONID means Java), the framework in use (Django means Python, Laravel means PHP, Rails means Ruby, ASP.NET means .NET) and the web server banner. Many sites hide all of these, in which case the language stays unknown.
Why couldn't a website be checked?
The site may be down, block automated requests, take longer than eight seconds to answer or use a non-standard port. Private and local network addresses are blocked for security.