What is MIME type "image/jpg"?
A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.
The MIME type image/jpg signals that a file stores a photo using the JPEG standard. It directs browsers and servers on how to process and display the image data.
It uses lossy compression to reduce file size while keeping photographic details.
- Delivers images on web pages and in emails
- Widely used by digital cameras and photo editing tools
- Optimizes loading times by balancing quality and file size
Common file types in this family include JPG, JFIF, JPEG, JIF, JPE, J, JLS, JFI, and JMH.
Systems often use image/jpeg interchangeably with image/jpg to denote the same JPEG image data.
Associated file extensions
jpg, jfif, jpeg, jif, jpe, j, jls, jfi, jmh
Usage Examples
HTTP Header
When serving content with this MIME type, set the Content-Type header:
Content-Type: audio/ogg
HTML
In HTML, you can specify the MIME type in various elements:
<a href="file.dat" type="image/jpg">Download file</a>
Server-side (Node.js)
Setting the Content-Type header in Node.js:
const http = require('http');
http.createServer((req, res) => {
res.setHeader('Content-Type', 'text/plain');
res.end('Content here');
}).listen(3000);
Associated file extensions
jpg, jfif, jpeg, jif, jpe, j, jls, jfi, jmh
FAQ
What is a MIME type?
A MIME (Multipurpose Internet Mail Extensions) type is a standard that indicates the nature and format of a document, file, or assortment of bytes. MIME types are defined and standardized in IETF's RFC 6838.
MIME types are important because they help browsers and servers understand how to process a file. When a browser receives a file from a server, it uses the MIME type to determine how to display or handle the content, whether it's an image to display, a PDF to open in a viewer, or a video to play.
MIME types consist of a type and a subtype, separated by a slash (e.g., text/html, image/jpeg, application/pdf). Some MIME types also include optional parameters.
How do I find the MIME type for a file?
You can check the file extension or use a file identification tool such as file --mime-type
on the command line. Many programming languages also provide libraries to detect MIME types.
Why are multiple MIME types listed for one extension?
Different applications and historical conventions may use alternative MIME identifiers for the same kind of file. Showing them all helps ensure compatibility across systems.