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MIME Types — Complete Content-Type Reference

Every MIME type explained with HTTP Content-Type headers, file extensions, browser compatibility, and code examples for Express.js and Next.js. Click any type for the full reference.

⚙️Application

application/json
JSON
JavaScript Object Notation.
.json
application/ld+json
JSON-LD
JSON for Linking Data.
.jsonld
application/xml
XML
Extensible Markup Language.
.xml.xsl.xsd
application/pdf
PDF
Portable Document Format.
.pdf
application/zip
ZIP Archive
ZIP archive format.
.zip
application/gzip
Gzip Archive
GNU zip compression format.
.gz.tgz.tar.gz
application/octet-stream
Binary Data
The default MIME type for arbitrary binary data.
application/x-www-form-urlencoded
URL-encoded Form Data
The default encoding for HTML form submissions.
application/wasm
WebAssembly
WebAssembly binary format.
.wasm

📄Text

text/html
HTML
HyperText Markup Language.
.html.htm
text/css
CSS
Cascading Style Sheets.
.css
text/javascript
JavaScript
JavaScript source code.
.js.mjs.cjs
text/plain
Plain Text
Plain UTF-8 (or ASCII) text with no markup.
.txt.log.md
text/csv
CSV
Comma-Separated Values.
.csv

🖼️Image

image/jpeg
JPEG Image
Joint Photographic Experts Group format.
.jpg.jpeg
image/png
PNG Image
Portable Network Graphics.
.png
image/webp
WebP Image
Google's modern image format.
.webp
image/svg+xml
SVG Image
Scalable Vector Graphics.
.svg
image/avif
AVIF Image
AV1 Image File Format.
.avif

🎬Video

video/mp4
MP4 Video
MPEG-4 Part 14.
.mp4.m4v
video/webm
WebM Video
WebM is an open, royalty-free video format based on the Matroska container with VP8/VP9/AV1 video and Vorbis/Opus audio.
.webm

🎵Audio

audio/mpeg
MP3 Audio
MPEG-1/2 Audio Layer III (MP3).
.mp3

📦Multipart

multipart/form-data
Multipart Form Data
An encoding for HTML forms that include file uploads.

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