Browse all MIME types

image/jpeg

JPEG remains the default for photos and rich imagery where small file sizes matter more than transparency or perfect edge fidelity.

image
Usually already encoded

Content-Type header

Content-Type: image/jpeg
Common extensions
.jpeg.jpg

How teams usually encounter it

This page maps the media type to the file extensions and delivery behaviors developers usually care about: browser parsing, upload validation, cache correctness, and asset handling.

Compression signal

image/jpeg is usually already compressed or stored in a binary-heavy format, so extra transfer compression tends to help less.

Server config snippets

Use these when a server is missing the right extension-to-MIME mapping or you want the expected header to survive a proxy, CDN, or custom asset bucket setup.

Nginx
types {
  image/jpeg jpeg jpg;
}
Apache
AddType image/jpeg .jpeg .jpg

Magic bytes / file signature

When you need to validate uploads or investigate a mislabeled file, the signature often starts with FF D8 FF.

Operational shortcut

If a browser downloads this asset instead of rendering it correctly, check the response header first, then verify the extension mapping on your origin and edge cache. .jpeg is the fastest sanity check for teammates reviewing the file outside the app.

Related image types