Is This Website Built on React? Free React Checker
Not sure if a site is built on React? Paste the URL below and Laikastack confirms it in seconds – and shows you the rest of the stack too.
How to tell if a website uses React
Laikastack checks all of these automatically, so you don't have to dig through page source.
- react and react-dom bundles
- React root markup
Why it matters
For web designers and developers: the front-end framework tells you how a site is built and how a rebuild would be scoped. For sales teams: if your product targets teams using this technology, detecting it surfaces technically-aligned prospects worth prioritising.
About React
React is a JavaScript library for building interactive user interfaces.
Frequently asked questions
How can I tell if a website uses React?
Paste the URL into the checker above. Laikastack inspects the markup, scripts, headers and signatures and confirms whether React is present, with a confidence score.
Is the React checker free?
Yes – single-site checks are free and need no signup.
Can it detect more than just the platform?
Yes. Alongside the platform you get the full stack – CMS, theme, plugins, frameworks, analytics and hosting.