Purlock
Free tool · Tech stack checker

What is this site built with?

See the site builder, hosting, analytics, chat and payment tools behind any website. We only report clear fingerprints, so nothing here is a guess.

Free, with no account needed.

What it checks

What you get from the tech stack checker

  • Builder and framework

    Shopify, WordPress, Webflow, Next.js and more.

  • Hosting

    Vercel, Netlify, Cloudflare and others, from their response headers.

  • Tools

    Analytics, chat, payments, booking and reviews.

For developers

Three lines from your own code

Every tool is also an API, with one simple answer format. Keep your key on your server.

JavaScript

const res = await fetch("https://www.purlock.com/v1/tools/tech-stack-checker?target=example.com", {
  headers: { authorization: `Bearer ${process.env.PURLOCK_API_KEY}` },
});
const report = await res.json();

Prompt for Cursor or Lovable

Add a call to the Purlock Tech stack checker API on the server side of this app. Send GET https://www.purlock.com/v1/tools/tech-stack-checker?target=VALUE with the header "Authorization: Bearer" and the PURLOCK_API_KEY environment variable. The JSON answer has status ("good", "attention" or "bad"), headline, checks (each with level, title, detail, fix) and data. If the call fails or times out after 3 seconds, carry on as if it wasn't there. Never put the API key in client code.

Free plan: 100 calls a month. Individual: 5,000. Business: 25,000.

FAQ

Questions, answered

Why is something missing?
We only list what leaves a clear fingerprint on the homepage, and many tools don't. An empty result doesn't mean nothing is there.

More free tools

Use it from your own code

Get a free API key with 100 calls a month. No card needed.

Get your API key