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
130 ms

  • https://md.coolab.org/s/9Nc9kN-LC

    Status
    200
    Message
    OK
    Time
    130 ms
  • IP
    159.203.86.156
    View Map

  • Timing

    Wait

    0 ms

    DNS

    33 ms

    TCP

    11 ms

    Request

    0 ms

    First Byte

    73 ms

    Download

    0 ms

    Total

    130 ms

  • HTTP Headers

    Server

    nginx/1.29.8

    A name for the server.

    • Server

      nginx

      Description of the server software.

    • Version

      1.29.8

      Version number.

    Date

    Fri, 30 Oct 2026 04:16:43 GMT

    The date and time that the message was sent.

    Content-Type

    text/html; charset=utf-8

    The MIME type of this content.

    Problems were detected with this header

    • Unknown MIME type.
    Content-Length

    9393(9.39 kB)

    The length of the response body in octets (8-bit bytes).

    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.

    X-Powered-By

    Express

    The software powering this site.

    Strict-Transport-Security

    max-age=31536000; includeSubDomains; preload

    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.

    • preload

      Use Google's preloading strict transport security.

    Strict-Transport-Security

    max-age=31536000

    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).

    Problems were detected with this header

    • Duplicate header. There is another header with this name and this may cause problems.
    Referrer-Policy

    same-origin

    Controls what referrer information is sent with requests.

    same-origin - Send the full referrer for same origin requests, and nothing for cross-origin.

    Content-Security-Policy

    default-src 'self';script-src 'self' vimeo.com https://gist.github.com www.slideshare.net 'unsafe-eval' https://disqus.com https://*.disqus.com https://*.disquscdn.com https://www.google-analytics.com 'nonce-7d136116-7d8f-400b-a331-b7bb1fdab696' 'sha256-81acLZNZISnyGYZrSuoYhpzwDTTxi7vC1YM4uNxqWaM=';img-src *;style-src 'self' 'unsafe-inline' https://github.githubassets.com https://*.disquscdn.com;font-src 'self' data: https://public.slidesharecdn.com https://*.disquscdn.com;object-src *;media-src *;child-src *;connect-src *

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

    • Default-Src

      Fallback for all fetches.

      • 'self'

    • Script-Src

      Define sources for JavaScript.

      • 'self'
      • vimeo.com
      • https://gist.github.com
      • www.slideshare.net
      • 'unsafe-eval'
      • https://disqus.com
      • https://*.disqus.com
      • https://*.disquscdn.com
      • https://www.google-analytics.com
      • 'nonce-7d136116-7d8f-400b-a331-b7bb1fdab696'
      • 'sha256-81acLZNZISnyGYZrSuoYhpzwDTTxi7vC1YM4uNxqWaM='

    • Img-Src

      Define sources for images and favicons.

      • *

    • Style-Src

      Define sources for stylesheets.

      • 'self'
      • 'unsafe-inline'
      • https://github.githubassets.com
      • https://*.disquscdn.com

    • Font-Src

      Define sources for fonts.

      • 'self'
      • data:
      • https://public.slidesharecdn.com
      • https://*.disquscdn.com

    • Object-Src

      Define sources for object, embed, and applet elements.

      • *

    • Media-Src

      Define sources for audio, video, and track elements.

      • *

    • Child-Src

      Define sources for web works and frames.

      • *

    • Connect-Src

      Define sources for script interfaces.

      • *
    Hedgedoc-Version

    1.8.2

    Cache-Control

    private

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

    private - May only be stored by a browser cache.

    Etag

    W/"24b1-4r4ZmNID2+RLcErjwY77Ri6SM4k"

    An identifier for a specific version of a resource.

    • Validator

      weak

      A weak tag is easier to generate and prevents byte range caching.

    • Tag

      24b1-4r4ZmNID2+RLcErjwY77Ri6SM4k

    Set-Cookie

    connect.sid=s%3AHqOGzyQZTenRW91XzqKo9QZfzOwXCrnh.QkNIPeEWhHXvUh0Pv06Fqanf9eJMQqu4gnxDUAqBZ1c; Path=/; Expires=Fri, 13 Nov 2026 04:16:43 GMT; HttpOnly; Secure; SameSite=Lax

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

    • connect.sid

      s%3AHqOGzyQZTenRW91XzqKo9QZfzOwXCrnh.QkNIPeEWhHXvUh0Pv06Fqanf9eJMQqu4gnxDUAqBZ1c

      Cookie name and value.

    • Path

      /

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

    • Expires

      Fri, 13 Nov 2026 04:16:43 GMT

      When the cookie should expire.

    • HttpOnly

      Prevents access to the cookie through JavaScript.

    • Secure

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

    • Samesite

      Lax

      Cookie is not sent on cross-site requests but is when following a link to the origin.

    Vary

    Accept-Encoding

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

    • Headers

      • Accept-Encoding