Sentry

Server-side fingerprint: the response header reveals the technology behind the page. Visible in DevTools → Network → response headers.

Sentry-Trace:

Window-level global the technology installs on page. Reproducible by typing the path into the DevTools console.

window.Raven.config

window.SENTRY_SDK_SOURCE

window.Sentry

window.Sentry.SDK_VERSION = (.+)

window.__SENTRY__

window.ravenOptions.whitelistUrls

Substring or regex match against the page HTML — typically a unique class, comment marker, or asset path.

<script[^>]*>\s*Raven\.config\('[^']*', \{\s+release: '([0-9\.]+)'

<script[^>]*src="[^"]*browser\.sentry\-cdn\.com/([0-9.]+)/bundle(?:\.tracing)?(?:\.min)?\.js

Script URL pattern. Typically a CDN host or chunk path that ships with the technology.

browser\.sentry\-cdn\.com/([0-9.]+)/bundle(?:\.tracing)?(?:\.min)?\.js

\.sentry-cdn\.com/

How do I check if a website is using Sentry?

Open the page in Chrome, click the Sourcemap Explorer toolbar icon, and read the Stack tab. The popup matches Sentry's fingerprint signals (response headers, asset URL prefixes, runtime globals, sourcemap paths) and flags it whenever any combination is found. The same checks can be reproduced manually in DevTools — see the "How we detect" section above.

What Sentry version can Sourcemap Explorer detect?

Sentry ships as a hosted issue trackers rather than a bundled npm package, so version-specific detection isn't always possible. Where the platform leaks a version in response headers (`X-Powered-By`, `Server`, generator meta tags) we surface it; otherwise we report presence only.

Where can I read more about Sentry?

Official site: https://sentry.io/. For Sourcemap Explorer's detection guide, see the deep-dive link below or the related guides in the cross-link section.