What is a cookie parser?
A cookie parser splits a Cookie header into name/value pairs you can read.
Use it when debugging auth, sessions, or feature flags stored in cookies.
Runs in browser
Cookie Parser
Parse cookie header strings into readable name/value pairs.
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What is Cookie Parser?
A cookie parser turns a raw Cookie header (or document.cookie string) into readable name/value pairs. Developers use it when debugging auth cookies, session tokens, consent flags, and third-party tracking cookies during development.
Cookie strings are semicolon-separated key=value pairs. URL encoding, HttpOnly, Secure, SameSite, and Path attributes matter for security, but a parser's first job is simply showing what is stored.
How Cookie Parser Works
- 1
Paste the cookie string
Copy the Cookie header from DevTools Network → Request Headers, or paste document.cookie from the console.
- 2
Parse into pairs
The tool splits on semicolons, decodes values where needed, and lists each cookie name with its value.
- 3
Inspect and copy
Review individual cookies, spot expired or unexpected values, and copy a single cookie for further testing.
Features
- 100% free — no subscription, trial limits, or paywalls
- No signup required — start using Cookie Parser immediately
- Privacy-first: runs entirely in your browser
- Works on desktop, tablet, and mobile browsers
- Dark and light theme support
- Keyboard-friendly interface with accessible controls
- Related tools and guides linked on every page
- Optimized for search engines and AI assistants
When to Use Cookie Parser
- Debugging login or session cookies that fail in staging
- Reading Set-Cookie / Cookie headers from API traces
- Checking whether a consent or A/B flag cookie is present
- Teaching teammates what raw cookie strings look like
Examples
Typical browser cookie string
Each pair becomes a separate row so you can inspect or copy one cookie at a time.
Input
session_id=abc123; theme=dark; consent=1
Output
session_id → abc123 theme → dark consent → 1
Common Mistakes
- Treating cookie values as secrets just because they look opaque — many are only Base64 or JSON
- Forgetting URL-decoding (%20, %3D) when values look garbled
- Mixing Set-Cookie response headers with Cookie request headers
- Assuming HttpOnly cookies appear in document.cookie (they do not)
Tips & Best Practices
- In Chrome DevTools, use Application → Cookies for domain-scoped views
- Pair with JWT Decoder if a cookie value is a JWT
- Never paste production session cookies into untrusted tools on shared machines
Frequently Asked Questions
How do I parse cookies online?
Paste the Cookie header or document.cookie string and run Parse.
TechHowAI’s Cookie Parser runs in your browser and does not require signup.
Why can’t I see HttpOnly cookies?
HttpOnly cookies are not exposed to JavaScript via document.cookie.
View them in DevTools Application → Cookies or from Set-Cookie response headers.
Is cookie parsing the same as decoding JWT?
No. Cookies are name/value pairs; a JWT is a signed token that may be stored inside a cookie.
If a cookie value looks like eyJ…, decode it with the JWT Decoder.
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