Paste a raw Cookie: header or just the value string
Try sample:
Cookie results will appear here
Paste a cookie string and click Parse// split raw cookie headers into name-value pairs
Parse raw HTTP Cookie header strings into name-value pairs instantly. Decode URL-encoded values, inspect cookie attributes, and debug session cookies online free.
Paste a raw Cookie: header or just the value string
Cookie results will appear here
Paste a cookie string and click ParseCopy from browser DevTools → Network tab → Request Headers → Cookie field
Toggle URL-decoding and type detection to suit your needs
Get a clean name-value table with decoded values and type labels
Copy individual values or export all parsed cookies as JSON or CSV
The Cookie String Parser splits raw HTTP Cookie header values into individual name-value pairs. It handles URL-encoded values, detects common cookie categories, and lets you inspect session data during debugging without a browser extension.
No. All parsing is done entirely in your browser using JavaScript. No cookie data is ever transmitted to any server. This tool is 100% client-side and privacy-safe.
Open browser DevTools (F12), go to the Network tab, click any request to your site, and look under Request Headers for the "Cookie" field. You can copy the entire value including the "Cookie: " prefix — the tool will strip it automatically.
Cookie values sometimes contain percent-encoded characters like %20 (space) or %3D (equals sign). URL-decoding converts these back to their original characters so the value is human-readable.
Some cookies are set with an empty value intentionally (e.g., a cookie used just for its presence/absence). The tool shows these as empty to accurately reflect the cookie string.
This tool parses the request Cookie header (multiple cookies separated by semicolons). For Set-Cookie response headers (which include attributes like Expires, HttpOnly, SameSite), each Set-Cookie is a separate header line with a different format.
Type detection is heuristic-based — it looks at common cookie name patterns used by major frameworks and services. It works well for standard cookies but may label custom cookies as "general" if they don't match known patterns.
A Cookie String Parser is a tool that takes a raw HTTP Cookie header string and breaks it down into individual name-value pairs. When your browser sends a request to a web server, it includes all stored cookies for that domain in a single header formatted as name1=value1; name2=value2; name3=value3. Parsing this string manually can be tedious, especially when values are URL-encoded or when there are dozens of cookies set by analytics, advertising, and application frameworks.
💡 Looking for premium web development assets? MonsterONE offers unlimited downloads of templates, UI kits, and developer tools — worth checking out.
HTTP cookies are small pieces of data that a web server sends to the browser via the Set-Cookie response header. The browser stores these cookies and includes them in subsequent requests to the same domain using the Cookie request header. Each cookie has a name and value, and may have optional attributes like expiration date, domain scope, path, and security flags (HttpOnly, Secure, SameSite).
The Cookie request header concatenates all matching cookies into a semicolon-delimited string: Cookie: session=abc; user=john; theme=dark. This compact format is efficient for transmission but difficult to read when debugging.
Session cookies like PHPSESSID, JSESSIONID, and connect.sid maintain server-side session state. They typically contain an opaque random token that maps to server-stored session data. Authentication cookies may contain JWT tokens or signed session identifiers used to verify user identity without requiring re-login on every request.
Analytics cookies are among the most common you'll encounter. Google Analytics sets _ga (a unique client ID), _gid (a daily session identifier), and _ga_XXXXXX (for GA4 measurement IDs). Facebook sets _fbp for browser fingerprinting and _fbc for click tracking. These values are typically Base64-encoded or structured strings containing timestamps and random identifiers.
CSRF tokens like csrf_token, XSRF-TOKEN, and _token are used to prevent cross-site request forgery attacks. They contain cryptographically random values that must match a corresponding form field or header value. Preference cookies store user settings like language, theme, timezone, or display preferences.
Cookie values that contain special characters must be URL-encoded (percent-encoded) to conform to the HTTP specification. Characters like spaces (%20), equals signs (%3D), semicolons (%3B), and commas (%2C) would break the cookie string format if included literally. JSON values stored in cookies — containing curly braces, colons, and quotes — are almost always URL-encoded.
For example, a preference cookie storing {"theme":"dark","lang":"en"} would appear in the Cookie header as prefs=%7B%22theme%22%3A%22dark%22%2C%22lang%22%3A%22en%22%7D. The URL-decode option in this tool converts these back to readable text automatically.
Cookie debugging is a common need for web developers. Whether you're investigating unexpected behavior, diagnosing authentication issues, or auditing third-party cookies on a page, being able to quickly parse and read individual cookie values is essential. Instead of manually decoding values or writing one-off scripts, this tool provides instant visual parsing.
To capture a Cookie header for inspection: open Chrome or Firefox DevTools, navigate to the Network tab, reload the page, click any XHR or document request, and examine the Request Headers panel. The Cookie header value can be copied directly and pasted into this parser.
When sharing Cookie header strings with colleagues or posting them in support tickets, be careful — session cookies and authentication tokens can be used to impersonate you. Anyone with your PHPSESSID or auth token cookie can potentially access your account until the cookie expires or you log out. This tool never transmits your data anywhere, but you should still sanitize sensitive cookie values before sharing screenshots or logs publicly.
The Cookie request header follows a simple format defined in RFC 6265: cookie-pairs are separated by ; (semicolon followed by a space). Each pair is formatted as name=value. Unlike the Set-Cookie header, the Cookie request header does not include attributes like Expires, HttpOnly, or SameSite — those are only present in server responses.
Cookie names are case-sensitive. Session and session are treated as different cookies. Cookie values can be empty (e.g., disabled=), quoted (though browsers differ in handling), or URL-encoded. Some frameworks use s: or j: prefixes to indicate signed or JSON-serialized values.