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Cookie Inspector

Cookies, localStorage and sessionStorage of the active domain, with security flags at a glance.

chromeedgebraveoperafirefox🔒 Zero telemetryVersion 1.0.0
Download the extension for ChromeDownload the extension for Firefox

Description

Inspect the cookies of the active tab's domain — including HttpOnly cookies unreadable from JavaScript, via the extension API — alongside localStorage and sessionStorage. Each cookie shows its Secure, HttpOnly and SameSite flags, expiry (session vs persistent, time remaining) and automatic warnings when key protections are missing or SameSite=None lacks Secure. Read-only: it changes nothing. 100% offline, zero telemetry.

Features

  • Reads active-domain cookies, including HttpOnly, via browser.cookies
  • On-demand dump of localStorage and sessionStorage with byte sizes
  • Secure / HttpOnly / SameSite flags highlighted per cookie
  • Human-readable expiry: session, persistent with time left, or expired
  • Automatic warnings: missing Secure/HttpOnly, SameSite=None without Secure
  • Cookies sorted by severity of security findings
  • Show/hide sensitive values with a persisted preference
  • Read-only and 100% offline: no changes, no telemetry

Privacy

100% local processing in your browser. Zero telemetry: no data is sent to external servers.

Required permissions

  • cookies
  • activeTab
  • scripting
  • storage
  • host_permissions:<all_urls>

Screenshots

Cookie Inspector

Supported browsers

chromeedgebraveoperafirefox