"Tech Stack Fingerprinter: Reveal Any Website's Technology in Seconds"

2026-02-28 [developer-tools osint security http fingerprinting]

Ever looked at a website and wondered what's powering it? Now there's a dead-simple tool for that.

Tech Stack Fingerprinter — give it any URL and get back a complete picture of the technology stack in seconds, with no API keys, no registration, and no rate limits.

What it detects

Server & hosting nginx, Apache, Caddy, IIS, LiteSpeed, Gunicorn, Node.js, Kestrel — plus language (PHP, ASP.NET, Python, Ruby, Java) from response headers. Hosting providers detected include Vercel, Netlify, Cloudflare Pages, AWS, Azure, Google Cloud, Heroku, Fly.io, Render, and Railway.

CDN Cloudflare, Fastly, Akamai, Vercel, Netlify, AWS CloudFront, Azure CDN, BunnyCDN, KeyCDN, StackPath — all detected from characteristic response headers.

Frontend frameworks & libraries React, Next.js, Vue.js, Nuxt.js, Angular, Svelte, SvelteKit, Remix, Astro, jQuery, Bootstrap, Tailwind CSS, Alpine.js, htmx, Ember.js — detected from script patterns, data attributes, and HTML structure. Smart deduplication means you won't see both "Next.js" and "React" when Next.js is already implied.

CMS & platforms WordPress, Ghost, Shopify, Webflow, Squarespace, Wix, Drupal, Joomla, Magento, HubSpot, Contentful, Strapi, Gatsby — via URL patterns, HTML markers, and meta generator tags.

Analytics Google Analytics 4, Google Tag Manager, Plausible, Fathom, Matomo, Hotjar, Segment, Mixpanel, PostHog, Crisp, Intercom.

Security headers grade (A–F) Checks Strict-Transport-Security, Content-Security-Policy, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy. Weighted scoring so you can see at a glance how seriously a site takes security hygiene.

SSL/TLS info Certificate issuer, expiry date, days remaining, SANs, and protocol version — all without sending any credentials.

How it works

Everything is passive: one HTTP request to the target, some header inspection, and pattern matching on the HTML. No Puppeteer, no headless browser, no JavaScript execution. Fast, lightweight, and self-contained.

There's also a JSON API for programmatic use:

curl "https://epc.tools/tech-stack/api/scan?url=https://github.com"

Returns a structured payload with all detections, the security grade, SSL info, and response time.

Use cases

Competitive research — see what stack a competitor chose before rebuilding your own site
Agency pitches — walk into a client meeting knowing their stack cold
Security audits — instant security headers snapshot before a full engagement
Developer curiosity — sometimes you just want to know

Try it at epc.tools/tech-stack or hit the API directly.