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MIME Type

Look up MIME types from file extensions, filenames, and media types, then copy MIME or Content-Type header values locally.

Lookup runs locally as you type. Long filenames and paths stay in this field.

Enter an extension or MIME type

Use a file extension, filename, path, or media type.

MIME catalog

Known extensionsMIME typeCategoryCopy MIME

.json, .map

application/json

Application

.webmanifest

application/manifest+json

Application

.wasm

application/wasm

Application

.woff2

font/woff2

Font

.avif

image/avif

Image

.svg, .svgz

image/svg+xml

Image

.webp

image/webp

Image

.js, .mjs

text/javascript

Text

No common extension

application/1d-interleaved-parityfec

Application

No common extension

application/3gpdash-qoe-report+xml

Application

No common extension

application/3gpp-ims+xml

Application

No common extension

application/3gpphal+json

Application

No common extension

application/3gpphalforms+json

Application

No common extension

application/a2l

Application

No common extension

application/ace-groupcomm+cbor

Application

No common extension

application/ace-trl+cbor

Application

No common extension

application/ace+cbor

Application

No common extension

application/ace+json

Application

No common extension

application/activemessage

Application

No common extension

application/activity+json

Application

No common extension

application/aif+cbor

Application

No common extension

application/aif+json

Application

No common extension

application/alto-cdni+json

Application

No common extension

application/alto-cdnifilter+json

Application

No common extension

application/alto-costmap+json

Application

No common extension

application/alto-costmapfilter+json

Application

No common extension

application/alto-directory+json

Application

No common extension

application/alto-endpointcost+json

Application

No common extension

application/alto-endpointcostparams+json

Application

No common extension

application/alto-endpointprop+json

Application

No common extension

application/alto-endpointpropparams+json

Application

No common extension

application/alto-error+json

Application

No common extension

application/alto-networkmap+json

Application

No common extension

application/alto-networkmapfilter+json

Application

No common extension

application/alto-propmap+json

Application

No common extension

application/alto-propmapparams+json

Application

No common extension

application/alto-tips+json

Application

No common extension

application/alto-tipsparams+json

Application

No common extension

application/alto-updatestreamcontrol+json

Application

No common extension

application/alto-updatestreamparams+json

Application

No common extension

application/aml

Application

.ez

application/andrew-inset

Application

.appinstaller

application/appinstaller

Application

No common extension

application/applefile

Application

.aw

application/applixware

Application

.appx

application/appx

Application

.appxbundle

application/appxbundle

Application

No common extension

application/at+jwt

Application

No common extension

application/atf

Application

No common extension

application/atfx

Application

application/json

.json, .map

Application

application/manifest+json

.webmanifest

Application

application/wasm

.wasm

Application

font/woff2

.woff2

Font

image/avif

.avif

Image

image/svg+xml

.svg, .svgz

Image

image/webp

.webp

Image

text/javascript

.js, .mjs

Text

application/1d-interleaved-parityfec

No common extension

Application

application/3gpdash-qoe-report+xml

No common extension

Application

application/3gpp-ims+xml

No common extension

Application

application/3gpphal+json

No common extension

Application

application/3gpphalforms+json

No common extension

Application

application/a2l

No common extension

Application

application/ace-groupcomm+cbor

No common extension

Application

application/ace-trl+cbor

No common extension

Application

application/ace+cbor

No common extension

Application

application/ace+json

No common extension

Application

application/activemessage

No common extension

Application

application/activity+json

No common extension

Application

application/aif+cbor

No common extension

Application

application/aif+json

No common extension

Application

application/alto-cdni+json

No common extension

Application

application/alto-cdnifilter+json

No common extension

Application

application/alto-costmap+json

No common extension

Application

application/alto-costmapfilter+json

No common extension

Application

application/alto-directory+json

No common extension

Application

application/alto-endpointcost+json

No common extension

Application

application/alto-endpointcostparams+json

No common extension

Application

application/alto-endpointprop+json

No common extension

Application

application/alto-endpointpropparams+json

No common extension

Application

application/alto-error+json

No common extension

Application

application/alto-networkmap+json

No common extension

Application

application/alto-networkmapfilter+json

No common extension

Application

application/alto-propmap+json

No common extension

Application

application/alto-propmapparams+json

No common extension

Application

application/alto-tips+json

No common extension

Application

application/alto-tipsparams+json

No common extension

Application

application/alto-updatestreamcontrol+json

No common extension

Application

application/alto-updatestreamparams+json

No common extension

Application

application/aml

No common extension

Application

application/andrew-inset

.ez

Application

application/appinstaller

.appinstaller

Application

application/applefile

No common extension

Application

application/applixware

.aw

Application

application/appx

.appx

Application

application/appxbundle

.appxbundle

Application

application/at+jwt

No common extension

Application

application/atf

No common extension

Application

application/atfx

No common extension

Application
MIME Type

Quick start

1
Enter an extension, filename, or MIME type
2
Review MIME, header, charset, and extensions
3
Filter the catalog when browsing
4
Copy the value you need

Common scenarios

HTTP headers

choose a Content-Type value for API responses or static assets

Upload rules

prepare accept lists and extension hints

Data URLs

keep the MIME part beside Base64 payloads

Web assets

check AVIF, WebP, WASM, WOFF2, SVG, and webmanifest types

Usage advice

Extension lookup is a convention lookup, not file-content verification
Use the Content-Type header value when configuring HTTP responses
Text and JSON-like types often include UTF-8; binary formats usually do not

MIME lookup boundaries

This tool does not inspect file bytes or detect spoofed files
Do not use extension lookup as a security decision
The catalog follows the installed MIME database and may not include every private vendor type
Unknown extensions can use application/octet-stream only as a generic fallback when your system accepts a binary default

URL Quick Fill

Prefill the lookup query from the URL hash. query is required and capped at 256 characters. Category filtering uses the current tool setting and does not have a URL parameter.
query: Extension, filename, or MIME type to look up (required, up to 256 characters)
Example: #query=image/webp
Hash parameters stay in the browser for tool prefill; CrateX.app does not record them.
Do not put private filenames, internal paths, or sensitive text in URLs.

Privacy and security

Lookup runs in your browser. Query text is saved only as a local session draft.

FAQ

6

Continue with these related tools for the next step.

All tool processing happens locally in your browser.