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HTTPSense

Tech Stack Inspector

Detect the technology stack behind any website — server, CDN, hosting, frameworks, and more.

What is a Tech Stack Inspector?

A tech stack inspector detects the technologies powering a website by analysing HTTP headers, HTML content, JavaScript libraries, cookies, and DNS records. It can identify the web server (e.g., Nginx, Apache), CDN provider (e.g., Cloudflare, Fastly), CMS (e.g., WordPress, Shopify), frontend frameworks (e.g., React, Vue), analytics platforms, and more — all without needing access to the server itself.

HTTPSense's Tech Stack Inspector aggregates signals from multiple data sources — response headers, HTML meta tags, JavaScript globals, and SSL certificate details — to build a comprehensive technology profile. Each detection includes a confidence score and category, making it easy to understand what runs behind any public URL.

How to Use the Tech Stack Inspector

  1. Enter a URL in the search bar and click Detect Tech Stack.
  2. Review the Overview tab for hero stats and the highest-confidence categories.
  3. Switch to Server & Hosting for the web server, CDN, hosting provider, IPv4/IPv6 addresses, and SSL issuer.
  4. Check Frontend for JavaScript frameworks, UI libraries, and analytics tools detected from HTML and script URLs.
  5. Open Security for WAFs, bot-management, mail-auth signals (SPF / DMARC), and verification TXT records.
  6. Browse All for every detection with confidence and source signals.
  7. Use the Raw tab to Copy JSON or Download the complete report.

How the Tech Stack Inspector Works

When you submit a URL, we issue an HTTP GET, follow redirects, and retrieve the final response headers and HTML body. We then run a static fingerprinting pass against four signal sources: HTTP headers (Server, X-Powered-By, CDN edge markers like cf-ray), HTML structure (meta generator, class hints, framework scripts), resource URLs (<script src>, CMS marker paths), and DNS records (MX for mail providers, NS for DNS providers, TXT for SPF mail-sender hints and 20+ verification tokens such as Google, Facebook, Atlassian).

We also resolve every A and AAAA record so the Server & Hosting tab surfaces the full IPv4/IPv6 footprint, not just the first IP. Each detection is recorded with a confidence level (high / medium / low) and the source signal, so every finding is auditable. Categories — Server, CDN, Hosting, Frontend, Analytics, Security, CMS, Mail, DNS — are humanised in the UI and copy-friendly throughout.

Tech-stack detection is mostly domain-level — the stack is usually consistent across pages — but the specific URL can reveal additional script-level technologies. We do not run JavaScript or use a headless browser, so SPA-only stacks are inferred from build artefacts and HTTP signals.

Key Features

  • Multi-source detection — Correlates signals from headers, HTML, scripts, cookies, DNS (MX/NS/TXT), and SSL for higher accuracy.
  • DNS-driven enrichment — Identifies mail providers from MX records, DNS providers from NS records, SPF mail-senders from TXT, and 20+ verification tokens (Google, Facebook, Atlassian, and more).
  • Full IPv4/IPv6 footprint — Surfaces every resolved A and AAAA address so multi-region or dual-stack deployments are visible.
  • Confidence scoring — Every technology carries a high / medium / low confidence flag with the originating signal.
  • Six-tab layout — Overview, Server & Hosting, Frontend, Security, All, and Raw — each tab grouped with humanised category labels.
  • Copy & download — One-click copy on domain, server, IPs, issuer, nameservers, and signals; full JSON export from the Raw tab.
  • Version detection — Extracts version numbers from headers, generator tags, and script references when available.

Common Use Cases

  • Competitive analysis — Discover what technologies competitors use for their web stack, CDN, and analytics.
  • Sales engineering — Identify prospects running specific platforms (e.g., WordPress, Shopify) for targeted outreach.
  • Security researchers — Detect outdated server software, exposed framework versions, or missing security layers.
  • Developers — Explore how popular sites are built and what tools they rely on for inspiration and benchmarking.

Frequently Asked Questions

Why didn’t it detect React, Vue, or Angular?

These ship as bundled JavaScript without obvious markers in the static HTML. We rely on conservative build-tool hints (_next, __nuxt, ng-version, framework-specific data attributes) and may miss apps that strip these markers.

How accurate is the detection?

Detection is heuristic. We surface a confidence flag and the source signal for each finding so you can verify before relying on it.

How is this different from Wappalyzer or BuiltWith?

We focus on signals visible to a single HTTP request — no headless browser, no proprietary database. That makes us faster and less invasive at the cost of depth, especially for SPA-only stacks.

Does it identify CMS plugins?

Limited. We surface marker files and paths (for example, /wp-content/) but not specific plugin versions.

Is it free? Do I need to sign up?

Yes, the Tech Stack Inspector is free with no signup or API key.