Website Cookie Checker
List Set-Cookie headers returned by a website.
The Website Cookie Checker is an indispensable online utility designed to demystify the cookies a website intends to set on a user's browser. When you visit a web page, the server can send specific instructions in its HTTP response headers, telling your browser to store small pieces of data known as cookies. Our tool meticulously examines these initial HTTP Set-Cookie headers, providing a clear, itemized list of every cookie, along with its associated attributes like Domain, Path, Expires, Secure, HttpOnly, and SameSite.
This tool proves invaluable for various users. Web developers can utilize it to debug cookie configuration issues or verify that their applications are setting cookies correctly. Privacy auditors will find it essential for assessing a website's compliance with regulations like GDPR or CCPA, by identifying what data trackers are initiated upon first load. Marketers can gain insights into the tracking mechanisms employed by their own sites or competitors. Simply input a URL, and the Website Cookie Checker will fetch the server response, presenting the raw Set-Cookie header information in an easy-to-read format. A crucial tip: this tool reports only the initial cookies sent directly by the server; it does not display cookies set dynamically by client-side JavaScript or those resulting from subsequent redirects after the initial page load.
How to use Website Cookie Checker
Enter Website URL
Paste the full URL of the website you wish to inspect into the designated input field. Ensure the URL includes http:// or https:// for accurate results.
Initiate Cookie Check
Click the "Check Cookies" or similar button to send the request and retrieve the website's initial HTTP headers. The tool will then process the response.
Review Cookie List
Examine the generated list, which will display each Set-Cookie header found. Each entry will show the cookie's name, its value, and various attributes.
Analyze Cookie Attributes
Pay attention to attributes like Domain, Path, Expires, Secure, HttpOnly, and SameSite to understand the cookie's scope and security implications. These details are crucial for development and privacy auditing.
Refine or Re-check
If no cookies are found or you wish to investigate further, verify the URL for typos. You can also try checking sub-pages or different URLs from the same domain.
Frequently Asked Questions
What types of cookies does the Website Cookie Checker detect?
It specifically detects cookies sent via the Set-Cookie HTTP response header from the server on the initial request. This includes both first-party and third-party cookies if they are present in the initial server response.
Does this tool reveal cookies set by JavaScript or after user interaction?
No, the Website Cookie Checker only analyzes the initial HTTP headers received from the server when accessing the provided URL. It does not execute JavaScript or simulate user interactions, thus it won't show cookies set dynamically client-side or after subsequent requests.
What information does the tool provide for each detected cookie?
For each Set-Cookie header, the tool extracts and displays the cookie's name, its value, and critical attributes such as Domain, Path, Expires, Max-Age, Secure, HttpOnly, and SameSite.
Why would a cookie have 'Secure' or 'HttpOnly' flags, and what do they mean?
The Secure flag ensures the cookie is only sent over HTTPS connections, protecting it from interception. The HttpOnly flag prevents client-side scripts from accessing the cookie, mitigating certain cross-site scripting (XSS) attacks. Both are crucial for enhancing security.
Can I use this checker for websites that require a login or authentication?
The Website Cookie Checker operates on publicly accessible URLs without authentication. It cannot simulate a user login session, so it will only show cookies set by the public-facing page before any authentication processes.
How is this different from checking cookies in my browser's developer tools?
Browser developer tools show all cookies currently stored or sent by your browser, including those set by JavaScript or after multiple interactions. Our tool focuses on the initial Set-Cookie headers sent directly by the web server in response to a fresh, unauthenticated request.