Development environment · not production · data here is disposable

Cookies

This app writes a handful of first-party cookies on load and reads them back on every page. They stay in your browser, are never transmitted to any third party, and you can wipe them from this page at any time.

Currently set

NameValue
Reading…

Try it

Write your own cookie and watch it appear in the table above. It gets the same attributes as the rest: path /, one year max-age, SameSite=Lax, and Secure when the page is on HTTPS.

What each one is for

dev_visitor_idRandom id generated in your browser. Not tied to any account or profile.
dev_first_seenTimestamp of the first page you loaded on this host.
dev_visitsCounter incremented once per page load.
dev_current_pagePath of the page you are on, used to work out the previous one.
dev_last_pagePath of the page you came from within this app.
dev_seen_atTimestamp of the most recent page load.
dev_themeDark or light, so the theme button sticks between pages.