Knowing what a site is built with is useful for many roles: competitive research, migration planning, vendor evaluation, and security assessment. PageLens detects 28+ technologies directly from the browser without separate network tools.
What technology detection actually means
Modern pages expose signals through HTML attributes, CSS class names, script URLs, meta tags, HTTP response headers, JavaScript globals, and inline event patterns. A robust detector combines lightweight rules instead of depending on any single signal.
PageLens covers common frontend frameworks, CMS platforms, e-commerce systems, analytics tools, and infrastructure indicators in one pass from the active tab.
Practical uses
Competitive research — know whether a rival is built on Shopify, WordPress, or a custom stack.
Security review — identify outdated libraries or known CMS configurations quickly.
Client handoff — document the stack before migration or redesign.
Hiring and sales — engineers and salespeople can reference the stack during discovery calls.
Best practices
Treat detection as a starting point, not an audit. Confirm sensitive findings with deeper inspection.
Combine with SEO, accessibility, and security checks for richer context.
Export findings to a report format your team can share.
How PageLens fits
PageLens is a free Chrome extension that detects technologies alongside health score, SEO, accessibility, security, and link analysis. It is designed for fast, repeatable inspection rather than one-off research.
Try PageLens
Click the icon on any page to see its tech stack in seconds.