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Glossary Web & HTTP

MIME type

A MIME type (media type) names the format of content as type/subtype, such as text/html or image/png, so software knows how to handle it.

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In more detail

Servers send the MIME type in the Content-Type header, and email attachments use it too (MIME stands for Multipurpose Internet Mail Extensions). A wrong type can make a page show as plain text or a script refuse to run.

Try these tools

MIME Type Lookup

Look up a MIME type from a file extension, or find the file extension(s) for a MIME type.

See also

  • Glossary Magic bytes
    Magic bytes, or a file signature, are the fixed bytes at the start of a file that identify its true format regardless of its name or.
  • Cheat sheet MIME Types Cheat Sheet
    The MIME types for web pages, data, images, audio, video, fonts and archives.
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