MIME Types List — Content-Type Strings for Common Files

MIME types.

The Content-Type strings you set on responses and uploads — tap any to copy it.

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Tap any row to copy the value in the first column.

Text

MIME type	Extension	Used for
text/plain	.txt	Plain text
text/html	.html	Web pages
text/css	.css	Stylesheets
text/csv	.csv	CSV data
text/markdown	.md	Markdown
text/javascript	.js	JavaScript (modern)

Application

MIME type	Extension	Used for
application/json	.json	JSON APIs
application/pdf	.pdf	PDF documents
application/zip	.zip	ZIP archives
application/xml	.xml	XML data
application/octet-stream		Generic binary / download
application/x-www-form-urlencoded		HTML form posts
application/gzip	.gz	Gzip archives
application/wasm	.wasm	WebAssembly
application/vnd.ms-excel	.xls	Legacy Excel
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet	.xlsx	Excel spreadsheet

Image

MIME type	Extension	Used for
image/jpeg	.jpg	JPEG photos
image/png	.png	PNG images
image/gif	.gif	GIF images
image/webp	.webp	WebP images
image/svg+xml	.svg	SVG vectors
image/avif	.avif	AVIF images
image/x-icon	.ico	Favicons

Audio & video

MIME type	Extension	Used for
audio/mpeg	.mp3	MP3 audio
audio/wav	.wav	WAV audio
audio/ogg	.ogg	Ogg audio
video/mp4	.mp4	MP4 video
video/webm	.webm	WebM video
video/quicktime	.mov	QuickTime video

Fonts & uploads

MIME type	Extension	Used for
font/woff2	.woff2	Web fonts (modern)
font/woff	.woff	Web fonts
font/ttf	.ttf	TrueType fonts
multipart/form-data		File uploads in forms

Where MIME types show up

A MIME type (also called a media type or Content-Type) is the short string that tells a browser or server what kind of data it's looking at — application/json, image/png, text/html. It travels in the HTTP Content-Type header, and it's what makes a browser render a page instead of downloading it, or hand a PDF to the right viewer. The format is always type/subtype. Two come up constantly in development: application/json for API requests and responses, and application/octet-stream, the generic "unknown binary" type that browsers treat as a download. When a file serves or uploads with the wrong type, this is usually the first header to check. For the response codes that travel alongside it, see HTTP status codes.

FAQ

What's the MIME type for JSON?

application/json. It's the standard Content-Type for JSON request bodies and API responses. Older or non-standard APIs sometimes use text/json, but application/json is correct.

What is application/octet-stream?

It's the generic MIME type for arbitrary binary data — "unknown file". Browsers typically download rather than display it, so it's often used to force a file download or when the real type isn't known.