MIME Types Cheatsheet

text/plain                   .txt
text/html                    .html .htm
text/css                     .css
text/javascript              .js .mjs
text/csv                     .csv
text/xml                     .xml
text/markdown                .md
text/calendar                .ics
text/x-python                .py

application/json             .json
application/xml              .xml
application/javascript       .js
application/pdf              .pdf
application/zip              .zip
application/gzip             .gz
application/x-tar            .tar
application/octet-stream     binary (download)
application/x-www-form-urlencoded   form data
application/ld+json          JSON-LD
application/graphql          GraphQL
application/wasm             .wasm
application/x-yaml           .yaml .yml
application/toml             .toml
application/sql              .sql
application/msword           .doc
application/vnd.openxmlformats-officedocument
  .wordprocessingml.document .docx
application/vnd.ms-excel     .xls

image/jpeg                   .jpg .jpeg
image/png                    .png
image/gif                    .gif
image/webp                   .webp
image/svg+xml                .svg
image/avif                   .avif
image/bmp                    .bmp
image/tiff                   .tiff
image/x-icon                 .ico
image/apng                   .apng

# Audio
audio/mpeg                   .mp3
audio/ogg                    .ogg
audio/wav                    .wav
audio/webm                   .webm
audio/aac                    .aac
audio/flac                   .flac
audio/midi                   .midi

# Video
video/mp4                    .mp4
video/webm                   .webm
video/ogg                    .ogv
video/quicktime              .mov
video/x-msvideo              .avi
video/x-matroska             .mkv

multipart/form-data          file upload
multipart/mixed              email attachments
multipart/alternative        email text+HTML
multipart/related            compound docs

# Upload example (HTTP)
Content-Type: multipart/form-data; boundary=---abc

---abc
Content-Disposition: form-data; name="file"; filename="photo.jpg"
Content-Type: image/jpeg

(binary data)
---abc--

font/woff                    .woff
font/woff2                   .woff2
font/ttf                     .ttf
font/otf                     .otf
font/collection              .ttc

# Usage in CSS
@font-face {
  font-family: 'Custom';
  src: url('font.woff2') format('woff2'),
       url('font.woff') format('woff');
}

# HTTP Headers
Content-Type: application/json
Content-Type: text/html; charset=utf-8
Content-Type: multipart/form-data
Accept: application/json, text/plain

# Express.js
res.type('json')         // application/json
res.type('html')         // text/html

# <link> / <script> tags
<link rel="stylesheet" type="text/css">
<script type="text/javascript">
<script type="module">