MIME Type Lookup: 260+ File Extensions to Content-Type

Check a file's real MIME type

Drop any file to read its first bytes and identify the format. The file is read in your browser and is not uploaded.

Drop files here, or click to browse

Any file type, up to 50 at once. Only the first 4 KB of each is read.

Download the full list (267):

267 / 267

Extension	MIME type	Group
.txt	text/plain	Text
.log	text/plain	Text
.html	text/html	Text
.htm	text/html	Text
.css	text/css	Text
.js	text/javascript	Text
.mjs	text/javascript	Text
.cjs	text/javascript	Text
.csv	text/csv	Text
.tsv	text/tab-separated-values	Text
.md	text/markdown	Text
.markdown	text/markdown	Text
.ics	text/calendar	Text
.vcf	text/vcard	Text
.vtt	text/vtt	Text
.xhtml	application/xhtml+xml	Text
.jpg	image/jpeg	Image
.jpeg	image/jpeg	Image
.png	image/png	Image
.apng	image/apng	Image
.gif	image/gif	Image
.webp	image/webp	Image
.avif	image/avif	Image
.svg	image/svg+xml	Image
.ico	image/vnd.microsoft.icon	Image
.heic	image/heic	Image
.heif	image/heif	Image
.bmp	image/bmp	Image
.tif	image/tiff	Image
.tiff	image/tiff	Image
.jxl	image/jxl	Image
.psd	image/vnd.adobe.photoshop	Image
.mp3	audio/mpeg	Audio
.wav	audio/wav	Audio
.ogg	audio/ogg	Audio
.oga	audio/ogg	Audio
.opus	audio/ogg	Audio
.aac	audio/aac	Audio
.flac	audio/flac	Audio
.m4a	audio/mp4	Audio
.weba	audio/webm	Audio
.mid	audio/midi	Audio
.midi	audio/midi	Audio
.mp4	video/mp4	Video
.webm	video/webm	Video
.mov	video/quicktime	Video
.mkv	video/x-matroska	Video
.avi	video/x-msvideo	Video
.mpeg	video/mpeg	Video
.mpg	video/mpeg	Video
.ogv	video/ogg	Video
.3gp	video/3gpp	Video
.ts	video/mp2t	Video
.flv	video/x-flv	Video
.wmv	video/x-ms-wmv	Video
.pdf	application/pdf	Document
.doc	application/msword	Document
.docx	application/vnd.openxmlformats-officedocument.wordprocessingml.document	Document
.xls	application/vnd.ms-excel	Document
.xlsx	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet	Document
.ppt	application/vnd.ms-powerpoint	Document
.pptx	application/vnd.openxmlformats-officedocument.presentationml.presentation	Document
.odt	application/vnd.oasis.opendocument.text	Document
.ods	application/vnd.oasis.opendocument.spreadsheet	Document
.odp	application/vnd.oasis.opendocument.presentation	Document
.rtf	application/rtf	Document
.epub	application/epub+zip	Document
.ps	application/postscript	Document
.eps	application/postscript	Document
.eml	message/rfc822	Document
.json	application/json	Data
.jsonld	application/ld+json	Data
.geojson	application/geo+json	Data
.webmanifest	application/manifest+json	Data
.ndjson	application/x-ndjson	Data
.xml	application/xml	Data
.rss	application/rss+xml	Data
.atom	application/atom+xml	Data
.yaml	application/yaml	Data
.yml	application/yaml	Data
.toml	application/toml	Data
.sql	application/sql	Data
.zip	application/zip	Archive
.tar	application/x-tar	Archive
.gz	application/gzip	Archive
.tgz	application/gzip	Archive
.bz2	application/x-bzip2	Archive
.xz	application/x-xz	Archive
.zst	application/zstd	Archive
.7z	application/x-7z-compressed	Archive
.rar	application/vnd.rar	Archive
.jar	application/java-archive	Archive
.apk	application/vnd.android.package-archive	Archive
.dmg	application/x-apple-diskimage	Archive
.iso	application/x-iso9660-image	Archive
.woff	font/woff	Font
.woff2	font/woff2	Font
.ttf	font/ttf	Font
.otf	font/otf	Font
.eot	application/vnd.ms-fontobject	Font
.bin	application/octet-stream	Binary
.wasm	application/wasm	Binary
.exe	application/vnd.microsoft.portable-executable	Binary
.dll	application/vnd.microsoft.portable-executable	Binary
.torrent	application/x-bittorrent	Binary
.shtml	text/html	Text
.jsx	text/jsx	Text
.less	text/less	Text
.scss	text/x-scss	Text
.sass	text/x-sass	Text
.coffee	text/coffeescript	Text
.java	text/x-java-source	Text
.c	text/x-c	Text
.h	text/x-c	Text
.cpp	text/x-c	Text
.cc	text/x-c	Text
.hpp	text/x-c	Text
.php	application/x-httpd-php	Text
.sh	application/x-sh	Text
.pl	application/x-perl	Text
.appcache	text/cache-manifest	Text
.srt	application/x-subrip	Text
.ttl	text/turtle	Text
.n3	text/n3	Text
.opml	text/x-opml	Text
.rtx	text/richtext	Text
.sgml	text/sgml	Text
.jpe	image/jpeg	Image
.jfif	image/jpeg	Image
.svgz	image/svg+xml	Image
.cur	image/x-icon	Image
.jp2	image/jp2	Image
.jpx	image/jpx	Image
.heics	image/heic-sequence	Image
.heifs	image/heif-sequence	Image
.tga	image/x-tga	Image
.pcx	image/x-pcx	Image
.xcf	image/x-xcf	Image
.ktx	image/ktx	Image
.ktx2	image/ktx2	Image
.dds	image/vnd.ms-dds	Image
.wbmp	image/vnd.wap.wbmp	Image
.djvu	image/vnd.djvu	Image
.djv	image/vnd.djvu	Image
.emf	image/emf	Image
.wmf	image/wmf	Image
.dng	image/x-adobe-dng	Image
.cr2	image/x-canon-cr2	Image
.nef	image/x-nikon-nef	Image
.ai	application/postscript	Image
.aif	audio/x-aiff	Audio
.aiff	audio/x-aiff	Audio
.aifc	audio/x-aiff	Audio
.caf	audio/x-caf	Audio
.amr	audio/amr	Audio
.mka	audio/x-matroska	Audio
.wma	audio/x-ms-wma	Audio
.au	audio/basic	Audio
.snd	audio/basic	Audio
.mp2	audio/mpeg	Audio
.mpga	audio/mpeg	Audio
.spx	audio/ogg	Audio
.m3u	audio/x-mpegurl	Audio
.pls	audio/x-scpls	Audio
.ra	audio/x-pn-realaudio	Audio
.ram	audio/x-pn-realaudio	Audio
.m4v	video/x-m4v	Video
.mpe	video/mpeg	Video
.m2ts	video/mp2t	Video
.mts	video/mp2t	Video
.3g2	video/3gpp2	Video
.f4v	video/x-f4v	Video
.asf	video/x-ms-asf	Video
.qt	video/quicktime	Video
.h264	video/h264	Video
.m3u8	application/vnd.apple.mpegurl	Video
.mpd	application/dash+xml	Video
.docm	application/vnd.ms-word.document.macroEnabled.12	Document
.dotx	application/vnd.openxmlformats-officedocument.wordprocessingml.template	Document
.xlsm	application/vnd.ms-excel.sheet.macroEnabled.12	Document
.xlsb	application/vnd.ms-excel.sheet.binary.macroEnabled.12	Document
.xltx	application/vnd.openxmlformats-officedocument.spreadsheetml.template	Document
.pptm	application/vnd.ms-powerpoint.presentation.macroEnabled.12	Document
.ppsx	application/vnd.openxmlformats-officedocument.presentationml.slideshow	Document
.potx	application/vnd.openxmlformats-officedocument.presentationml.template	Document
.odg	application/vnd.oasis.opendocument.graphics	Document
.odf	application/vnd.oasis.opendocument.formula	Document
.odb	application/vnd.oasis.opendocument.database	Document
.ott	application/vnd.oasis.opendocument.text-template	Document
.pages	application/vnd.apple.pages	Document
.numbers	application/vnd.apple.numbers	Document
.key	application/vnd.apple.keynote	Document
.xps	application/vnd.ms-xpsdocument	Document
.oxps	application/oxps	Document
.mobi	application/x-mobipocket-ebook	Document
.azw	application/vnd.amazon.ebook	Document
.cbz	application/vnd.comicbook+zip	Document
.cbr	application/vnd.comicbook-rar	Document
.tex	application/x-tex	Document
.latex	application/x-latex	Document
.msg	application/vnd.ms-outlook	Document
.mbox	application/mbox	Document
.vsd	application/vnd.visio	Document
.pub	application/x-mspublisher	Document
.one	application/onenote	Document
.wpd	application/vnd.wordperfect	Document
.map	application/json	Data
.xsd	application/xml	Data
.xsl	application/xml	Data
.xslt	application/xslt+xml	Data
.dtd	application/xml-dtd	Data
.wsdl	application/wsdl+xml	Data
.rdf	application/rdf+xml	Data
.xspf	application/xspf+xml	Data
.xlf	application/x-xliff+xml	Data
.gpx	application/gpx+xml	Data
.kml	application/vnd.google-earth.kml+xml	Data
.kmz	application/vnd.google-earth.kmz	Data
.nt	application/n-triples	Data
.cbor	application/cbor	Data
.parquet	application/vnd.apache.parquet	Data
.sqlite	application/vnd.sqlite3	Data
.sqlite3	application/vnd.sqlite3	Data
.mdb	application/x-msaccess	Data
.pac	application/x-ns-proxy-autoconfig	Data
.bz	application/x-bzip	Archive
.lz	application/x-lzip	Archive
.lzma	application/x-lzma	Archive
.z	application/x-compress	Archive
.cab	application/vnd.ms-cab-compressed	Archive
.deb	application/vnd.debian.binary-package	Archive
.rpm	application/x-rpm	Archive
.xpi	application/x-xpinstall	Archive
.crx	application/x-chrome-extension	Archive
.war	application/java-archive	Archive
.ear	application/java-archive	Archive
.msi	application/x-msdownload	Archive
.ttc	font/collection	Font
.otc	font/collection	Font
.pfb	application/x-font-type1	Font
.class	application/java-vm	Binary
.swf	application/x-shockwave-flash	Binary
.glb	model/gltf-binary	3D and CAD
.gltf	model/gltf+json	3D and CAD
.obj	model/obj	3D and CAD
.stl	model/stl	3D and CAD
.3mf	model/3mf	3D and CAD
.usdz	model/vnd.usdz+zip	3D and CAD
.dae	model/vnd.collada+xml	3D and CAD
.step	model/step	3D and CAD
.stp	model/step	3D and CAD
.iges	model/iges	3D and CAD
.igs	model/iges	3D and CAD
.dwg	image/vnd.dwg	3D and CAD
.dxf	image/vnd.dxf	3D and CAD
.pem	application/x-pem-file	Security
.cer	application/pkix-cert	Security
.crt	application/x-x509-ca-cert	Security
.der	application/x-x509-ca-cert	Security
.p12	application/x-pkcs12	Security
.pfx	application/x-pkcs12	Security
.csr	application/pkcs10	Security
.p7b	application/x-pkcs7-certificates	Security
.sig	application/pgp-signature	Security
.asc	application/pgp-signature	Security
.gpg	application/pgp-encrypted	Security
.pgp	application/pgp-encrypted	Security

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How to use

Search or filter the list

Type an extension such as .webp or part of a MIME type such as image/ in the search box, or press a group such as Font or Security. The counter shows how many rows match.

Or drop files to check them

Drop up to 50 files on the checker, or click it to browse. Only the first 4 KB of each is read. You get the detected type, how it was identified and a warning if the extension disagrees.

Copy or export

Press Copy next to a type, nginx or Apache for a ready config line, or Copy header in the checker. Download the current group as JSON, CSV, nginx types or Apache AddType.

Why MIME Type Lookup

267 extensions in 11 groups, including 3D and CAD formats and certificates.
Signature-based file checks for up to 50 files at once, so renamed files are caught.
One-click nginx and Apache lines, and whole-list exports for server configs.
Search by MIME type to find every extension that uses it.

Common MIME types quick reference

These are the types most web projects need. The full searchable list below the checker has the rest.

Types are case-insensitive but almost always written in lowercase. Parameters follow a semicolon, as in text/html; charset=utf-8. Newer image formats such as AVIF and JPEG XL can be missing from older server type lists, so check them first when images download instead of displaying. The same applies to .webmanifest and .wasm files, which some servers still send as generic binary data.

Extension	MIME type
.html	text/html
.css	text/css
.js, .mjs	text/javascript
.json	application/json
.xml	application/xml
.txt	text/plain
.csv	text/csv
.pdf	application/pdf
.zip	application/zip
.jpg, .jpeg	image/jpeg
.png	image/png
.gif	image/gif
.webp	image/webp
.avif	image/avif
.svg	image/svg+xml
.ico	image/vnd.microsoft.icon
.mp4	video/mp4
.webm	video/webm
.mp3	audio/mpeg
.woff2	font/woff2

Setting Content-Type correctly

A wrong Content-Type can stop a stylesheet or script from loading, make a download open as text, or let a browser guess the type in unsafe ways. Most web servers pick the type from the file extension, so problems usually come from an extension missing from the server's list.

nginx reads types from its mime.types file. Add missing ones in a types block, for example image/avif avif;. The nginx types download builds that block for you.
Apache uses the AddType directive, for example AddType image/webp .webp in the config or an .htaccess file.
Add a charset to text types, such as text/html; charset=utf-8, so browsers do not have to guess the encoding.
Send X-Content-Type-Options: nosniff so browsers trust your type instead of sniffing. With it, scripts and stylesheets served with the wrong type are blocked.
For JSON APIs, send application/json. Avoid text/json, which was never a registered type.

Common questions

What is a MIME type?

A MIME type is a label in the form type/subtype, such as text/html or image/png, that tells software what kind of data a file holds. Servers send it in the Content-Type header, and browsers use it to decide whether to display, play or download the file.

How does the MIME type checker detect a file's real type?

Most binary formats start with a fixed signature, such as the bytes 89 50 4E 47 for PNG or %PDF- for PDF. The checker compares the first bytes against a list of these. Text formats have no signature, so it looks at how the text begins, such as <svg or <!DOCTYPE html. Formats built on ZIP, like .docx and .xlsx, share one signature, so the extension decides between them.

Why does my browser report a different MIME type than the checker?

The browser's value comes from the file extension, not the file's content. If a file was renamed, for example a JPEG saved as .png, the two disagree and the checker shows a warning.

Why does .js map to text/javascript instead of application/javascript?

RFC 9239 made text/javascript the standard type for JavaScript, and application/javascript is now considered obsolete. Browsers accept both, but new server configs should use text/javascript.

Is application/octet-stream a safe default for unknown files?

It is the correct label for arbitrary binary data, and browsers respond by downloading the file rather than showing it. Use it only when you do not know the type, never for images, PDFs or anything you want displayed inline.

What is the correct MIME type for .ico favicon files?

The registered type is image/vnd.microsoft.icon, which is what this list shows. Many servers send image/x-icon instead, and browsers accept either one.

Why is .ts listed as video/mp2t instead of TypeScript?

The .ts extension is also used for MPEG transport stream video, and that is the registered mapping in most server type lists. That is why a misconfigured server can send TypeScript files as video. Set the type explicitly if you serve TypeScript source.

Which MIME types should an upload form allow?

Allow only the types you actually need, and check the file's content signature on the server rather than trusting the extension or the Content-Type the browser sends. Be careful with SVG and HTML, which can contain scripts.

Does the MIME type checker upload my file?

No. The browser reads the first 4 KB of each file on your device and the check runs there. Nothing is sent to a server.

How do I add a MIME type to nginx or Apache from this list?

Press nginx on the row to copy a line such as image/avif avif; for a types block, or Apache to copy AddType image/avif .avif for your config or .htaccess file. To add many at once, download the nginx types or Apache AddType file for the group you need.

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MIME Type Lookup