Web Scraping API
Fetch and detect from any public URL, escalating through anti-bot transports.
Open pathDeveloper tool
Crawlora's free website tech stack checker fingerprints what any site is built with — JavaScript frameworks (React, Vue, Angular), meta-frameworks (Next.js, Nuxt, Gatsby), CMS and website builders (WordPress, Shopify, Wix, Webflow), analytics, tag managers, CDNs, payments, live chat, and more. It reads the page's HTML through the same detector you can call from the API, so you can check one site in the browser now and automate technographic lookups later.
Quick answer
Crawlora's free website tech stack checker detects the technologies any site is built with — frameworks, CMS, e-commerce platform, analytics, tag managers, CDNs, payments, and more — each with its category, a confidence level, and a version when detectable. Check one site free in the browser, then call the Crawlora API to run technographic lookups across many domains.
Use this to see the technologies behind any website — its framework, CMS, e-commerce platform, analytics, payments, and marketing tools — for competitive research, lead qualification, or vetting a stack.
Verify you're human before running
Example output before you run the tool
| Technology | Category | Confidence |
|---|---|---|
| Shopify | Ecommerce | high |
| Google Analytics | Analytics | high |
| Google Tag Manager | Tag manager | high |
| Meta Pixel | Analytics, Advertising | high |
| Klaviyo | Marketing automation | high |
| jQuery 3.6.0 | JavaScript library | high |
Type any public website — a competitor, a prospect, or your own site. No login, no account, no browser API key.
Crawlora fetches the page (escalating through anti-bot transports when needed) and fingerprints the technologies in its HTML.
See the detected technologies grouped by category — framework, CMS, e-commerce, analytics, payments — each with a confidence and version when available.
Copy the JSON or open the documented /web/techstack endpoint to run technographic lookups across many domains in your own pipeline.
See which framework, CMS, and marketing tools a rival runs before you plan positioning or a build.
Segment prospects by the platforms they run — e.g. Shopify stores or WordPress sites — to target and tailor outreach.
Quickly profile a site's stack when vetting an acquisition, partner, or vendor.
Find sites already running a complementary technology to prioritize integrations and co-marketing.
The free checker previews the same technology detection your product can run on demand. Use the API to enrich leads with technographics, monitor a competitor's stack, or segment a domain list by the platforms they run.
Check any website's estimated monthly visits, engagement, top countries, traffic sources, and keywords — free, no login. Powered by the SimilarWeb API.
URL → clean Markdown + metadata, free. Tested live on 180+ sites — news, ecommerce, jobs, real estate, finance — on the same /web/scrape API.
Paste a URL and see how hard it is to scrape — the anti-bot stack (Cloudflare, DataDome, Akamai, PerimeterX, Kasada and more), a 0–10 difficulty score, and the transport you'd need.
Production path
The free checker previews the same technology detection your product can run on demand. Use the API to enrich leads with technographics, monitor a competitor's stack, or segment a domain list by the platforms they run.
Technographic lead enrichment, competitor stack monitoring, and domain segmentation at scale.