Why does my login cookie not show up?

Secure login systems set the HttpOnly flag on session cookies so JavaScript cannot read them — this tool uses document.cookie and respects that. DevTools → Application → Cookies can inspect them if needed.

I deleted a cookie and it came back — why?

Another script on the page is re-setting it. Analytics, consent banners, and some embedded widgets do this. Look at the Network tab to find the culprit.

Is it safe to reveal values?

Reveal exposes the values in the DOM on this page only — CheckMySys does not send them anywhere. Still, avoid revealing on a shared screen.

Cookie Viewer

See every cookie JavaScript can read on this origin, with values masked by default. Reveal and delete individually — or all at once.

Total size

0 B

Scope

this origin

Not read yet

No JavaScript-visible cookies on this origin. HttpOnly cookies (used by most login systems) are hidden from this API and are not shown.

HttpOnly cookies stay hidden because browsers do not expose them to JavaScript.

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