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What is Header Checker?

While people is browsing webpages on the Internet, first thing that makes browsers firstly process is the data from header. This data is small text tell browsers which actions to do next but the normal user cannot see it because it is hidden content. This header checker will show you all content text from a webpage that is sending to your browser in header. It contains cookie, content-type, server powered by, response code, content length..

HTTP/1.0 200 OK =>
Date => Tue, 15 Dec 2015 08:00:04 GMT
Expires => -1
Cache-Control => private, max-age=0
Content-Type => text/html; charset=ISO-8859-1
P3P => CP="This is not a P3P policy! See for more info."
Server => gws
X-XSS-Protection => 1; mode=block
X-Frame-Options => SAMEORIGIN
Set-Cookie => NID=74=NHRfzyq4NnsEf42MmLVDntsoYK_axIt-P1MUY09Zk4ymtXAmYIZkSZ7d_wUNE88ETK0I3h0VPVJ0TG8krihgUu_tDmHLDBvuVfN7gee-iawFvoHin4mGBttaVaUTPJR3wHNmEausu9HYew; expires=Wed, 15-Jun-2016 08:00:04 GMT; path=/;; HttpOnly
Accept-Ranges => none
Vary => Accept-Encoding

The content from header returned from a webpage

Check your webpage returned in header

If you are a Webmaster

Check header to know where you can be redirected

A lot of URLs hide the destination URL, that means when you access the URL you may be redirected to another one you do not know before. This tool will help you to check that. The destination url you will be redirected to is normally display as location: http://[Destination URL]

The affiate partners hide the truly URL, when you click on the shorten URL you will be redirected to a online shop or services, and then you purchase and spend any money that means the affiliate partner will earn referral money. This section is not to recommend that you should not buy things from your referer but this help you know clearly what action you are doing

Variables and it's meaning that were returned from header

Accept Content-Types that are acceptable for the response. See Content negotiation.
Accept-Charset Character sets that are acceptable
Accept-Encoding List of acceptable encodings. See HTTP compression.
Accept-Language List of acceptable human languages for response. See Content negotiation.
Accept-Datetime Acceptable version in time
Authorization Authentication credentials for HTTP authentication
Cache-Control Used to specify directives that must be obeyed by all caching mechanisms along the request-response chain
Connection Control options for the current connection and list of hop-by-hop request fields
Cookie An HTTP cookie previously sent by the server with Set-Cookie
Content-Length The length of the request body in octets (8-bit bytes)
Content-MD5 A Base64-encoded binary MD5 sum of the content of the request body
Content-Type The MIME type of the body of the request (used with POST and PUT requests)
Date The date and time that the message was sent
Expect Indicates that particular server behaviors are required by the client
From The email address of the user making the request
Host The domain name of the server (for virtual hosting), and the TCP port number on which the server is listening. The port number may be omitted if the port is the standard port for the service requested.
If-Match Only perform the action if the client supplied entity matches the same entity on the server. This is mainly for methods like PUT to only update a resource if it has not been modified since the user last updated it.
If-Modified-Since Allows a 304 Not Modified to be returned if content is unchanged
If-None-Match Allows a 304 Not Modified to be returned if content is unchanged, see HTTP ETag
If-Range If the entity is unchanged, send me the part(s) that I am missing; otherwise, send me the entire new entity
If-Unmodified-Since Only send the response if the entity has not been modified since a specific time.
Max-Forwards Limit the number of times the message can be forwarded through proxies or gateways.
Origin Initiates a request for cross-origin resource sharing (asks server for an 'Access-Control-Allow-Origin' response field) .
Pragma Implementation-specific fields that may have various effects anywhere along the request-response chain.
Proxy-Authorization Authorization credentials for connecting to a proxy.
Range Request only part of an entity. Bytes are numbered from 0. See Byte serving.
Referer This is the address of the previous web page from which a link to the currently requested page was followed.
TE The transfer encodings the user agent is willing to accept: the same values as for the response header field Transfer-Encoding can be used, plus the "trailers" value (related to the "chunked" transfer method) to notify the server it expects to receive additional fields in the trailer after the last, zero-sized, chunk.
User-Agent The user agent string of the user agent
Upgrade Ask the server to upgrade to another protocol.
Via Informs the server of proxies through which the request was sent.
Warning A general warning about possible problems with the entity body.

Non-standard request fields

X-Requested-With mainly used to identify Ajax requests. Most JavaScript frameworks send this field with value of XMLHttpRequest
DNT Requests a web application to disable their tracking of a user. This is Mozilla's version of the X-Do-Not-Track header field (since Firefox 4.0 Beta 11). Safari and IE9 also have support for this field.On March 7, 2011, a draft proposal was submitted to IETF.The W3C Tracking Protection Working Group is producing a specification
X-Forwarded-For a de facto standard for identifying the originating IP address of a client connecting to a web server through an HTTP proxy or load balancer
X-Forwarded-Host a de facto standard for identifying the original host requested by the client in the Host HTTP request header, since the host name and/or port of the reverse proxy (load balancer) may differ from the origin server handling the request.
X-Forwarded-Proto a de facto standard for identifying the originating protocol of an HTTP request, since a reverse proxy (or a load balancer) may communicate with a web server using HTTP even if the request to the reverse proxy is HTTPS. An alternative form of the header (X-ProxyUser-Ip) is used by Google clients talking to Google servers.
Front-End-Https Non-standard header field used by Microsoft applications and load-balancers
X-Http-Method-Override Requests a web application override the method specified in the request (typically POST) with the method given in the header field (typically PUT or DELETE). Can be used when a user agent or firewall prevents PUT or DELETE methods from being sent directly (note that this either a bug in the software component, which ought to be fixed, or an intentional configuration, in which case bypassing it may be the wrong thing to do).
X-ATT-DeviceId Allows easier parsing of the MakeModel/Firmware that is usually found in the User-Agent String of AT&T Devices
X-Wap-Profile Links to an XML file on the Internet with a full description and details about the device currently connecting. In the example to the right is an XML file for an AT&T Samsung Galaxy S2.
Proxy-Connection Implemented as a misunderstanding of the HTTP specifications. Common because of mistakes in implementations of early HTTP versions. Has exactly the same functionality as standard Connection field.
X-UIDH Server-side deep packet insertion of a unique ID identifying customers of Verizon Wireless; also known as "perma-cookie" or "supercookie"
X-Csrf-Token Used to prevent cross-site request forgery. Alternative header names are: X-CSRFToken and X-XSRF-TOKEN
X-XSS-Protection Cross-site scripting (XSS) filter
Content-Security-Policy, X-Content-Security-Policy, X-WebKit-CSP Content Security Policy definition.
X-Content-Type-Options The only defined value, "nosniff", prevents Internet Explorer from MIME-sniffing a response away from the declared content-type. This also applies to Google Chrome, when downloading extensions.
X-Powered-By specifies the technology (e.g. ASP.NET, PHP, JBoss) supporting the web application (version details are often in X-Runtime, X-Version, or X-AspNet-Version)
X-UA-Compatible Recommends the preferred rendering engine (often a backward-compatibility mode) to use to display the content. Also used to activate Chrome Frame in Internet Explorer.
X-Content-Duration Provide the duration of the audio or video in seconds; only supported by Gecko browsers


HTTP/1.1 302 Moved Temporarily
Date: Fri, 18 Dec 2015 01:36:26 GMT
Content-Type: text/html
Connection: close
Set-Cookie: __cfduid=dd2848a166329c6698cf299f3381855da1450402585; expires=Sat, 17-Dec-16 01:36:25 GMT; path=/;; HttpOnly
Vary: Accept-Encoding
Server: cloudflare-nginx
CF-RAY: 256722fe419c198c-HKG
HTTP/1.1 302 Found
Date: Fri, 18 Dec 2015 01:36:24 GMT
Server: Apache
Content-Length: 250
Connection: close
Content-Type: text/html; charset=iso-8859-1
HTTP/1.1 302 Found
Date: Fri, 18 Dec 2015 01:36:24 GMT
Server: Apache
X-Powered-By: PHP/5.3.14
Set-Cookie: _s=05rc1ltdkgs1q4r9aot0rh4arjv2vm4jmihkeeoj4987ce8o741dqj1mismkac18ucu8ga2ppihe9bjlvj839ouc6offrhr0q3ahis0; path=/; HttpOnly
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Set-Cookie: idev=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/;
Set-Cookie:; expires=Thu, 17-Mar-2016 01:36:25 GMT; path=/;
Content-Length: 0
Connection: close
Content-Type: text/html
HTTP/1.0 200 OK
Date: Fri, 18 Dec 2015 01:36:25 GMT
Server: Apache
X-Powered-By: PHP/5.3.14
Set-Cookie: symfony=e3cd540ec55fa059c96fadc2a50603b4; path=/
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Connection: close
Content-Type: text/html; charset=utf-8

HTTP Response Status Codes

1xx Info / Informational - Request received, continuing process.

Indicates a provisional response, consisting only of the Status-Line and optional headers, and is terminated by an empty line.

2xx Success / OK - HTTP_SUCCESS - The action was successfully received, understood, and accepted.

Indicates that the client's request was successfully received, understood, and accepted.

3xx Redirect - The client must take additional action to complete the request.

Indicates that further action needs to be taken by the user-agent in order to fulfill the request. The action required may be carried out by the user agent without interaction with the user if and only if the method used in the second request is GET or HEAD. A user agent should not automatically redirect a request more than 5 times, since such redirections usually indicate an infinite loop.

4xx Client Error - The request contains bad syntax or cannot be fulfilled.

Indicates case where client seems to have erred. Except when responding to a HEAD request, the server should include an entity containing an explanation of the error situation, and whether it is a temporary or permanent condition.

5xx Server Error -The server failed to fulfill an apparently valid request.

Indicate cases in which the server is aware that it has erred or is incapable of performing the request. Except when responding to a HEAD request, the server should include an entity containing an explanation of the error situation, and whether it is a temporary or permanent condition. User agents should display any included entity to the user. These response codes are applicable to any request method.

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