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MIME Type
image/jpeg
ImageStandard MIME type for JPEG images, commonly used for photos.
MIME type reference, HTTP example, browser usage, common mistakes, and related content.
What is the image/jpeg MIME type?
The MIME type image/jpeg is used to tell browsers, APIs, and servers how a file or response body should be interpreted.
MIME stands for Multipurpose Internet Mail Extensions, and MIME types are now a standard part of HTTP responses and web content delivery.
When a browser or client receives a response with image/jpeg, it uses that information to decide how the content should be processed, rendered, downloaded, or executed.
Example
Content-Type: image/jpeg
HTTP example
HTTP/1.1 200 OK Content-Type: image/jpeg Content-Length: 1256
Common file extensions
.jpg.jpeg
Common use cases
- Photographs
- Compressed image delivery
- Web galleries
Common mistakes
- Using the wrong MIME type for the file being served
- Returning text/plain instead of image/jpeg
- Forgetting required parameters like charset when relevant
- Using a deprecated MIME type in older server configurations
- Serving assets with a mismatched Content-Type header, causing browser parsing issues
How browsers use it
Browsers use the Content-Type response header to decide how a response should be handled. For example, HTML is rendered as a page, CSS is parsed as styles, JavaScript is executed as script, and images are displayed visually. If the MIME type is incorrect, the browser may refuse to load the file correctly or may treat it as plain text or a download instead.
Browser support
Universal browser support and widely used for photographic images.
Developer note
A classic choice for photos, though WebP and AVIF are often better for web performance today.