Varnish Detector

Check any public website to see whether it uses Varnish.

Public signal scan

Fast lookup

No signup required

Enter a URL and Stackcrawler will inspect public technology signals.

Browse real website examples detected with Varnish.

Compare related tools and identify the wider stack behind a website.

Stackcrawler looks for public page markers, scripts, platform fingerprints, metadata, and other visible implementation clues.