HTTP Headers

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

Summary

Response
500
Total Requests
1
Total Time
853 ms

  • https://z9n.net/mv4tnv

    Status
    500
    Message
    Internal Server Error
    Time
    853 ms
  • IP
    172.67.165.20
    View Map

  • Timing

    Wait

    0 ms

    DNS

    11 ms

    TCP

    2 ms

    Request

    0 ms

    First Byte

    830 ms

    Download

    1 ms

    Total

    853 ms

  • HTTP Headers

    Date

    Fri, 26 Dec 2025 22:32:10 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-Powered-By

    PHP/8.4.15

    The software powering this site.

    X-Xss-Protection

    1; mode=block

    Cross-site scripting (XSS) filter.

    • 1

      Enable XSS filtering.

    • Mode

      Filtering mode.

      • block - Block page if XSS is detected.
    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'.

    Referrer-Policy

    no-referrer-when-downgrade

    Controls what referrer information is sent with requests.

    no-referrer-when-downgrade - Send the full referrer when the protocol security stays the same, or improves.

    Content-Security-Policy

    default-src 'self' http: https: ws: wss: data: blob: 'unsafe-inline' 'unsafe-eval'; frame-ancestors 'self';

    The content security policy allows the server to determine what resources the user is allowed to load.

    • Default-Src

      Fallback for all fetches.

      • 'self'
      • http:
      • https:
      • ws:
      • wss:
      • data:
      • blob:
      • 'unsafe-inline'
      • 'unsafe-eval'

    • Frame-Ancestors

      Define valid parents for frame, iframe, embed, object, and applet.

      • 'self'
    Permissions-Policy

    interest-cohort=()

    Enable and disable browser features.

    • interest-cohort

      Control access to Federated Learning of Cohorts.

      • () - Feature is disabled.
    Strict-Transport-Security

    max-age=31536000; includeSubDomains

    A HSTS Policy informing the HTTP client how long to cache the HTTPS only policy and whether this applies to subdomains.

    • Max-Age

      31536000 (1 year)

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

    • includesubdomains

      max-age applies to subdomains as well.

    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=12,cfOrigin;dur=813

    Server metrics for the request.

    • Cfedge

      • dur - 12

    • Cforigin

      • dur - 813

    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=PQ6MnE2o94I%2FJd%2Bjj3ygjNu75qPKRAb8JlQTrLgU8gQQR9A0712DV%2F7xSiEl%2BtYPgvVXtx47J2DO4YFoyafuu58y4Mgt3Xw%3D"}]}

    Report to.

    • Group

      cf-nel

    • Max_age

      604800

    • Endpoints

      • {"url":"https://a.nel.cloudflare.com/report/v4?s=PQ6MnE2o94I%2FJd%2Bjj3ygjNu75qPKRAb8JlQTrLgU8gQQR9A0712DV%2F7xSiEl%2BtYPgvVXtx47J2DO4YFoyafuu58y4Mgt3Xw%3D"}
    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-Ray

    9b440853c87c4238-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).