MIME Type Lookup Guide: Content-Type Headers and File Extensions
MIME types tell browsers, APIs and servers how to interpret a file or response. The right Content-Type prevents broken downloads, malformed API responses and confusing browser behavior.
What a MIME type looks like
A media type has a category and subtype, such as text/html, application/json, image/png or application/pdf. Some responses also include a charset, for example text/html; charset=utf-8.
Common examples
.html:text/html.json:application/json.css:text/css.js:text/javascript.svg:image/svg+xml
Why it matters
Incorrect MIME types can block scripts, force files to download, break fonts or cause API clients to parse a response incorrectly. Always verify headers when moving files between CDNs, servers and static hosts.