What MIME type should I use for a .json file?

Use application/json for JSON files and API responses. It is the standard type and should be served with charset UTF-8 where possible.

What is the MIME type for .js files?

The official type for JavaScript is text/javascript. The older application/javascript is obsolete and should no longer be used.

SVG files use image/svg+xml. Make sure you serve them as SVG, not as image/xml, or browsers will not render them inline.

Servers and upload forms rely on these strings; a wrong type can break previews, downloads, or your Content Security Policy.

Updated: 2026-09-01

Kind	MIME type	Typical ext
HTML	text/html	.html
CSS	text/css	.css
JavaScript	text/javascript	.js
JSON	application/json	.json
XML	application/xml	.xml
Plain text	text/plain	.txt
CSV	text/csv	.csv
PDF	application/pdf	.pdf
ZIP	application/zip	.zip
PNG	image/png	.png
JPEG	image/jpeg	.jpg
GIF	image/gif	.gif
WebP	image/webp	.webp
SVG	image/svg+xml	.svg
ICO	image/x-icon	.ico
MP3	audio/mpeg	.mp3
WAV	audio/wav	.wav
MP4	video/mp4	.mp4
WebM	video/webm	.webm
WOFF2	font/woff2	.woff2
Form URL-encoded	application/x-www-form-urlencoded	—
Multipart form	multipart/form-data	—

What MIME type should I use for a .json file?: Use application/json for JSON files and API responses. It is the standard type and should be served with charset UTF-8 where possible.
What is the MIME type for .js files?: The official type for JavaScript is text/javascript. The older application/javascript is obsolete and should no longer be used.
What MIME type does an SVG image use?: SVG files use image/svg+xml. Make sure you serve them as SVG, not as image/xml, or browsers will not render them inline.