Tool description

An online cookie decoder and parser that decodes and analyzes HTTP cookies from both Cookie and Set-Cookie headers. This cookie parser tool breaks down cookie strings into individual cookies with their names, values, and security attributes, making it easy to parse cookies online, understand cookie behavior, and debug web applications.

Features

  • Multiple Cookie Formats: Parses both Cookie headers (name=value pairs) and Set-Cookie headers (with attributes)
  • Complete Attribute Parsing: Extracts all cookie attributes including Domain, Path, Expires, Max-Age, Secure, HttpOnly, SameSite, and Partitioned
  • Current Page Cookies: Quick button to load and analyze cookies from the current webpage
  • Smart Date Formatting: Displays expiration dates with validity status (Expired/Valid)
  • Human-Readable Durations: Converts Max-Age values to readable time units (seconds, minutes, hours, days)
  • Security Flag Indicators: Visual alerts for Secure, HttpOnly, and Partitioned flags
  • Copy to Clipboard: Each cookie value and attribute can be copied separately
  • Multi-Cookie Support: Parses multiple cookies from a single input string
  • Error Handling: Clear error messages for invalid cookie formats

Use Cases

  • Web Development: Debug cookie issues and understand cookie behavior in applications
  • Security Testing: Analyze cookie security attributes and identify potential vulnerabilities
  • API Integration: Parse Set-Cookie headers from HTTP responses for API testing
  • Cookie Debugging: Troubleshoot cookie-related issues in authentication and session management
  • Privacy Analysis: Review cookie attributes to understand data persistence and scope
  • Browser DevTools Alternative: Quick cookie inspection without opening browser DevTools
  • Documentation: Extract cookie information for API and integration documentation
  • QA Testing: Verify cookie implementation matches security and privacy requirements
  • Learning Tool: Understand HTTP cookie structure and attribute meanings
  • Cookie Migration: Analyze cookies when migrating between different platforms or frameworks