NovaBlockNovaBlock
Free Tools

Decode and classify any cookie string.

Paste a Set-Cookie header or a document.cookie string. We parse each cookie, flag tracking IDs, and explain what every attribute does.

PrivacyInstantNo sign-up required

Accepts a Set-Cookie header (one per line) or a document.cookie string (semicolon-separated). Everything runs locally in your browser.

Cookies parsed
5
Known trackers
2
2 of these cookies are known third-party trackers. NovaBlock blocks most of them before they're even set.
  • _gaTracker · Google Analytics
    value: GA1.2.123456789.1700000000

    Visitor identifier (2-year lifespan).

  • _fbpTracker · Meta Pixel
    value: fb.1.1700000000.987654321

    Browser-level Facebook ad identifier.

  • sessionId
    value: abc123
  • Path
    value: /
  • HttpOnly

About this tool

Paste any cookie string — either a raw Set-Cookie header (one per line) or a copy of your browser's document.cookie output. We split each cookie into name, value and attributes, then cross-reference against a list of widely deployed tracking cookies.

Everything happens in your browser. We never send the cookies you paste to our servers.

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