HTTP Response Headers

HTTP Response Headers

HTTP Response Headers

This online tool helps to analyze HTTP Response headers. Server return array of HTTP headers according to request headers like Accept-Ranges, Allow, Cache-Control, Content-Encoding, Content-Language, Content-Length, Content-Type, Expires, Last-Modified, Set-Cookie and many more.


HTTP Response Headers

Online HTTP Response Headers tool allows viewing HTTP Headers for given URL. HTTP Headers form the core of an HTTP request, and are very important in an HTTP response. They define various characteristics of the data that is requested or the data that has been provided. The headers are separated from the request or response body by a blank line. HTTP headers can be near-arbitrary strings, but only some are commonly understood.


URL must start with http:// , https:// , ftp://


HTTP Requests Headers

Response Headers

Header Description Example
Accept-Ranges What partial content range types this server supports Accept-Ranges: bytes
Age The age the object has been in a proxy cache in seconds Age: 12
Allow Valid actions for a specified resource. To be used for a 405 Method not allowed Allow: GET, HEAD
Cache-Control Tells all caching mechanisms from server to client whether they may cache this object Cache-Control: no-cache
Content-Encoding The type of encoding used on the data Content-Encoding: gzip
Content-Language The language the content is in Content-Language: da
Content-Length The length of the response body in octets (8-bit bytes) Content-Length: 348
Content-Location An alternate location for the returned data Content-Location: /index.php
Content-Disposition An opportunity to raise a "File Download" dialogue box for a known MIME type Content-Disposition: attachment; filename=readme.txt
Content-MD5 A Base64-encoded binary MD5 sum of the content of the response Content-MD5: Q7hlY9sgSW5TTWdyaXR1IQ==
Content-Range Where in a full body message this partial message belongs Content-Range: bytes 19010-47021/47022
Content-Type The mime type of this content Content-Type: text/html; charset=utf-8
Date The date and time that the message was sent Date: Wed, 07 Oct 2009 09:23:14 GMT
ETag An identifier for a specific version of a resource, often a Message Digest ETag: "731975cd8c284d8af7ad2072f209582d"
Expires Gives the date/time after which the response is considered stale Expires: Wed, 07 Oct 2009 09:23:14 GMT
Last-Modified The last modified date for the requested object, in RFC 2822 format Last-Modified: Wed, 07 Oct 2009 09:23:14 GMT
Location Used in redirection, or when a new resource has been created. Location:
Pragma Implementation-specific headers that may have various effects anywhere along the request-response chain. Pragma: no-cache
Proxy-Authenticate Request authentication to access the proxy. Proxy-Authenticate: Basic
Refresh Used in redirection, or when a new resource has been created. This refresh redirects after 5 seconds.
(This is a proprietary/non-standard header extension introduced by Netscape and supported by most web browsers.)
Refresh: 5; url=
Retry-After If an entity is temporarily unavailable, this instructs the client to try again after a specified period of time. Retry-After: 120
Server A name for the server Server: Apache/1.3.27 (Unix) (Red-Hat/Linux)
Set-Cookie an HTTP cookie Set-Cookie: UserID=Sam; Max-Age=3600; Version=1
Trailer The Trailer general field value indicates that the given set of header fields is present in the trailer of a message encoded with chunked transfer-coding. Trailer: Max-Forwards
Transfer-Encoding The form of encoding used to safely transfer the entity to the user. Currently defined methods are: chunked, compress, deflate, gzip, identity. Transfer-Encoding: chunked
Vary Tells downstream proxies how to match future request headers to decide whether the cached response can be used rather than requesting a fresh one from the origin server. Vary: *
Via Informs the client of proxies through which the response was sent. Via: 1.0 fred, 1.1 (Apache/1.1)
Warning A general warning about possible problems with the entity body. Warning: 199 Miscellaneous warning
WWW-Authenticate Indicates the authentication scheme that should be used to access the requested entity. WWW-Authenticate: Basic

Online HTTP Response Header Information:

  • Purpose of this Tool : View HTTP Request and Response Header
  • Intended Audience : Webmasters, Web Developers, Programmers, System Administrators

External Resources: