Tech Stack Detector

The Tech Stack Detector is a free online tool that detect frameworks, analytics, cdn, and other technologies from pasted html source code. identifies 33+ technologies across 4 categories.. It runs entirely in your browser with no installation or sign-up needed.

Scans HTML for known patterns: script references, meta tags, class names, and global variables associated with specific technologies, then assigns confidence (High/Medium/Low).

33+: React, Next.js, Vue, Nuxt, Angular, Svelte, jQuery, Bootstrap, Tailwind, WordPress, Shopify, GA, GTM, FB Pixel, Hotjar, Clarity, Cloudflare, Vercel, AWS, and more.

No. All analysis runs client-side in your browser.

Yes, the Tech Stack Detector is 100% free with no registration, no hidden fees, and no usage limits. All processing happens locally in your browser, ensuring complete privacy.

Absolutely. The Tech Stack Detector processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.

Yes, the Tech Stack Detector is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.

No account or registration is needed. Simply open the Tech Stack Detector in your browser and start using it immediately. There are no sign-up walls or usage restrictions.

Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.

The Tech Stack Detector works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.

Confidence reflects how much evidence in the HTML points to a technology. Every matched pattern — a script reference, a framework-specific attribute, a global object, a telltale path — carries a weight, and the combined weight sets the level. High means multiple strong signals agree, so the technology is almost certainly present. Medium means one solid signal or several weaker ones, which is usually reliable but worth a glance. Low means a single faint match, like a generic utility class, that could be a coincidence and deserves a closer look before you trust it. Because the actual signals are listed beside every result, you can verify a finding rather than take it on faith. Paste a page's source above and check the evidence behind each confidence rating yourself.

Open the page you want to analyze in your browser, right-click anywhere on it, and choose "View Page Source" — or use the keyboard shortcut Ctrl+U on Windows and Linux, or Cmd+Option+U on a Mac. A new tab opens showing the raw HTML the server sent. Select all of it (Ctrl+A or Cmd+A), copy it, and paste it into the tool's input box. Avoid using "Inspect Element," since that shows the live, JavaScript-modified DOM rather than the original markup that carries the cleanest technology fingerprints. If you just want to try the tool first, click "Load Sample HTML" to fill in a demo page wired with WordPress, jQuery, Tag Manager, the Facebook Pixel, Hotjar, and Stripe, then run the scan to see how results appear.

Detection is pattern-based, so it can only find what is actually visible in the HTML you paste. Heavily minified, bundled, or server-rendered pages often strip the recognizable references and attributes that act as fingerprints, hiding technologies that are genuinely there. Tools loaded later by JavaScript, injected through a tag manager, or sitting behind a login or paywall may not appear in the raw source at all. Some platforms also proxy or rename their assets, erasing the telltale paths the scanner looks for. This is the same limitation any source-based detector faces, and it is why results reflect the markup rather than the full running site. For the most complete picture, paste the full page source rather than a fragment, and treat a clean result as evidence about that specific HTML.

Wappalyzer and BuiltWith typically fetch a URL for you, run as browser extensions, or sit behind accounts and paid plans, and they often render the live page to inspect it. This Tech Stack Detector instead analyzes HTML that you paste, which keeps everything client-side: your markup is scanned in your browser, never uploaded, with no sign-up and no usage limits. That trade-off makes it a fast, private, no-account alternative for spot checks, vendor vetting, and competitive research, though it sees only the source you provide rather than crawling a whole site. It recognizes 33+ technologies across frameworks, analytics, CDN and hosting, and other services, and shows the exact signals behind each match. Paste a page's source above to inventory its stack without installing an extension or creating an account.

Yes. After a scan, results group automatically by category — Frameworks and Libraries, Analytics, CDN and Hosting, and Other — with a summary panel that counts the totals and the High, Medium, and Low confidence split. From there you have two export options. You can copy a formatted text report straight to your clipboard, which is handy for pasting findings into a message, ticket, or notes. Or you can download a CSV file listing every technology along with its category, confidence level, and the specific evidence that triggered the match. The CSV opens cleanly in Excel, Google Sheets, or any spreadsheet app, making it easy to build audit records, compare several pages, or share a documented breakdown with a team. Paste some HTML, run the detection, and use either export to capture the results.