HTTP Headers

Show the HTTP headers for a URL, with a full break-down of details. Will follow redirects.

Summary

Response
200
Total Requests
1
Total Time
292 ms
  • IP
    104.21.4.18
    View Map

  • Timing

    Wait

    0 ms

    DNS

    10 ms

    TCP

    4 ms

    Request

    0 ms

    First Byte

    271 ms

    Download

    0 ms

    Total

    292 ms

  • HTTP Headers

    Date

    Sat, 06 Dec 2025 14:28:47 GMT

    The date and time that the message was sent.

    Content-Type

    text/html; charset=UTF-8

    The MIME type of this content.

    • Type

      text/html

    • Description

      HTML file

    • Charset

      UTF-8

    Connection

    keep-alive

    Control options for the current connection and list of hop-by-hop response fields.

    keep-alive - The client would like to keep the connection open.

    Server

    cloudflare

    A name for the server.

    cloudflare - Description of the server software.

    X-Content-Type-Options

    nosniff

    Prevents Internet Explorer from MIME-sniffing a response away from the declared content-type.

    nosniff - Block requests if type 'style' or 'script'.

    Set-Cookie

    cpPosTime=1765031327.5448; expires=Sat, 06-Dec-2025 14:29:47 GMT; Max-Age=60; path=/; secure; HttpOnly

    A cookie sent from the server to be set on the client

    • cpPosTime

      1765031327.5448

      Cookie name and value.

    • Expires

      Sat, 06-Dec-2025 14:29:47 GMT

      When the cookie should expire.

    • Max-Age

      60 (1 minute)

      Number of seconds until the cookie expires.

    • Path

      /

      The client will only send the cookie when requesting this path, or subdirectories, from the server.

    • secure

      The cookie is only sent when requesting from a https domain.

    • HttpOnly

      Prevents access to the cookie through JavaScript.

    Content-Language

    en

    The natural language or languages of the intended audience for the enclosed content.

    en - English

    X-Ua-Compatible

    IE=Edge

    Recommends the preferred rendering engine (often a backward-compatibility mode) to use to display the content.

    IE=Edge - Use highest level rendering.

    Link

    </resources/assets/wiki.png?de8c8>;rel=preload;as=image

    Used to express a typed relationship with another resource.

    • Link

      /resources/assets/wiki.png?de8c8

      • rel - preload
      • as - image
    Vary

    Accept-Encoding, Cookie

    Indicates that different content may be provided to different clients, depending on the vary header.

    • Headers

      • Accept-Encoding
      • Cookie
    Expires

    Thu, 01 Jan 1970 00:00:00 GMT

    The time at which the response is considered stale.

    Cache-Control

    private, must-revalidate, max-age=0

    Inform all caching mechanisms from server to client whether they may cache this object.

    • private

      May only be stored by a browser cache.

    • must-revalidate

      Stale caches must not be used.

    • Max-Age

      0

      The time a browser should remember a site can only be accessed with https (seconds).

    Last-Modified

    Wed, 26 Nov 2025 16:56:48 GMT

    The last modified date for the requested object.

    Nel

    {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}

    Configure network request logging.

    • Report_to

      cf-nel

    • Success_fraction

      0

    • Max_age

      604800

    Cf-Cache-Status

    DYNAMIC

    Encoded information about your request from Cloudflare.

    DYNAMIC - This is not cached by default.

    Server-Timing

    cfCacheStatus;desc="DYNAMIC"

    Server metrics for the request.

    • Cfcachestatus

      DYNAMIC

    Server-Timing

    cfEdge;dur=16,cfOrigin;dur=251

    Server metrics for the request.

    • Cfedge

      • dur - 16

    • Cforigin

      • dur - 251

    Problems were detected with this header

    • Duplicate header. There is another header with this name and this may cause problems.
    Report-To

    {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=h8YgDZLVKWmiUMuBOMzhErlZcYkmgGQR4AkUp2oxZjlhW6VCk1nY0OI4ZmJGH3TXoVQtbqImD8xMUj%2F%2BcX6gj4Fq9FRku9Nn1UNWTukyZMru"}]}

    Report to.

    • Group

      cf-nel

    • Max_age

      604800

    • Endpoints

      • {"url":"https://a.nel.cloudflare.com/report/v4?s=h8YgDZLVKWmiUMuBOMzhErlZcYkmgGQR4AkUp2oxZjlhW6VCk1nY0OI4ZmJGH3TXoVQtbqImD8xMUj%2F%2BcX6gj4Fq9FRku9Nn1UNWTukyZMru"}
    Cf-Ray

    9a9c78c3fb638068-EWR

    Encoded information about your request from Cloudflare.

    Alt-Svc

    h3=":443"; ma=86400

    Indicate a resource should be loaded from a different server while still appearing to be loaded from this server.

    • Service

      • h3 - :443

    • Service

      • ma - 86400 (1 day)

        Max age for the alternative (seconds).