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Response

Content-Type

Indicates the media type of the response body, telling the browser how to interpret and display the content.

Syntax

Content-Type: <media-type>; charset=<encoding>

Example

Content-Type: text/html; charset=UTF-8

Description

Content-Type specifies the MIME type and character encoding of the response body. One of the most fundamental HTTP headers.

Consists of a media type (e.g., text/html, application/json) and optionally a charset parameter.

Incorrect Content-Type can cause rendering issues and security vulnerabilities. Always set it explicitly with X-Content-Type-Options: nosniff.

How real sites send this header

Home-page responses of 503 popular sites from the enterno.io /check catalogue, checked in the last 30 days.

99.2% (499 of 503) send Content-Type.

Most common values:

  • text/html; charset=UTF-8 — 360 sites
  • text/html — 100 sites
  • text/html;charset=UTF-8 — 30 sites

See it on: google.com, yandex.ru, discord.com, github.com, cloudflare.com

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