HTTP Headers Checker

Use the WaooTools HTTP Headers Checker to inspect the HTTP response headers returned by a website or webpage. Enter a URL to view available headers, response information, and other technical details.

HTTP headers can provide useful information for website troubleshooting, SEO audits, caching checks, redirects, and reviewing server and security configurations.

How to Use the HTTP Headers Checker

1. Enter the URL you want to check.
2. Click Check Headers.
3. Wait for the HTTP response.
4. Review the returned status code and headers.
5. Analyze the available information for troubleshooting or website analysis.

What Are HTTP Headers?

HTTP headers are pieces of information exchanged between a client, such as a web browser, and a web server when handling an HTTP request or response.

Response headers can provide information about how a server handled a request and how the browser or other client should process the response.

For example, common response headers include:

• Content-Type
• Content-Length
• Cache-Control
• Location
• Server
• Set-Cookie
• Strict-Transport-Security
• Content-Security-Policy

What Does the HTTP Headers Checker Check?

The tool can help you view:

• HTTP response status code
• Response headers
• Content type
• Cache-Control information
• Server information
• Redirect location
• Cookie-related headers
• Security-related headers
• Content encoding
• Last-Modified information
• ETag information
• Other available HTTP headers

The exact headers returned depend on the website, server, CDN, application, and request being made.

Common HTTP Headers Explained

Content-Type

Shows the type of content returned by the server, such as HTML, JSON, images, or other file formats.

Cache-Control

Provides instructions related to caching and how responses may be stored or reused.

Location

Usually identifies the destination URL when a server response redirects a request.

Server

May provide information about the software or server handling the request, although many servers hide or modify this information.

Set-Cookie

Used by servers to send cookies to a browser or other client.

Strict-Transport-Security

Also known as HSTS, this header provides instructions for using HTTPS for future requests to the domain.

Content-Security-Policy

CSP can define rules controlling which types of resources a browser is allowed to load for a webpage.

Why Use an HTTP Headers Checker?

An HTTP Headers Checker can be useful for:

• Technical SEO audits
• Website troubleshooting
• Checking HTTP status codes
• Reviewing redirect behavior
• Analyzing caching settings
• Checking available security headers
• Inspecting server responses
• Debugging website configuration
• Reviewing CDN or proxy behavior

It can help developers and website owners understand how a server responds to requests.

HTTP Headers vs HTTP Status Codes

An HTTP status code tells you the general result of an HTTP request, such as 200 OK, 301 Moved Permanently, or 404 Not Found.

HTTP headers provide additional information about the request or response, including content type, caching, redirects, cookies, and security-related settings.

Both are important when troubleshooting website behavior.

Limitations

The headers returned can vary depending on the server, CDN, firewall, proxy, browser behavior, and request method.

Some servers intentionally hide certain headers or return different responses based on the requesting client. The tool only shows information available from the response it receives.

A security-related header being present or absent does not by itself provide a complete security assessment of a website.