How do I find the MIME type for a file extension?

Type the file extension into a free MIME type lookup tool. It instantly returns the correct content type — for example, .webp maps to image/webp and .pdf maps to application/pdf — which you can use in Content-Type headers, server configs, and API responses.

A MIME type (also called a media type or content type) is a label like text/html or image/png that tells a browser, mail client or API what kind of data it is receiving. It has two parts: a type (text, image, application, audio, video, font, multipart) and a subtype.

Why does the correct MIME type matter?

Browsers trust the Content-Type header to decide how to handle a response. Serve a script or stylesheet with the wrong type and browsers with nosniff enabled will refuse to run it; serve downloads with the wrong type and files open in the wrong app or arrive corrupted.

What is the MIME type for modern image formats?

WebP is image/webp, AVIF is image/avif and SVG is image/svg+xml. The classics are image/jpeg for .jpg, image/png for .png and image/gif for .gif. You can search this table by extension or by type to confirm any of them.

What should I use for a file type that is not listed?

application/octet-stream is the generic fallback for arbitrary binary data. It tells the receiver "this is a byte stream, save it rather than render it", which is the safe choice for unknown downloads.

Where do official MIME types come from?

The IANA media type registry is the official list, and common types are defined in RFCs. The table here covers the types developers actually meet daily: web, image, audio, video, document, archive, font and data formats.

DEVELOPER TOOLS · FREE ONLINE TOOL

MIME Type Lookup

Find the MIME type for any file extension, and backEvery file a server sends carries a label describing what it is, and that label decides what the browser does with it. Type a file extension or filename and this lookup tells you the correct content type in one step.

✓ Free to use✓ No sign-up✓ Ready in your browser

// MIME TYPE LOOKUP · GET STARTED

Use MIME Type Lookup

Find the MIME type for any file extension, and back

Search by extension, MIME type or description

111 of 111 entries shown. Click any row to copy its MIME type.

.htmltext/html · HTML document

.htmtext/html · HTML document

.csstext/css · CSS stylesheet

.jstext/javascript · JavaScript file

.mjstext/javascript · JavaScript module

.jsonapplication/json · JSON data

.jsonldapplication/ld+json · JSON-LD linked data

.xmlapplication/xml · XML document

.xhtmlapplication/xhtml+xml · XHTML document

.txttext/plain · Plain text file

.csvtext/csv · Comma-separated values

.tsvtext/tab-separated-values · Tab-separated values

.mdtext/markdown · Markdown document

.icstext/calendar · iCalendar event file

.vcftext/vcard · vCard contact file

.wasmapplication/wasm · WebAssembly binary

.mapapplication/json · Source map (served as JSON)

.webmanifestapplication/manifest+json · Web app manifest

.pngimage/png · PNG image

.jpgimage/jpeg · JPEG image

.jpegimage/jpeg · JPEG image

.gifimage/gif · GIF image

.webpimage/webp · WebP image

.avifimage/avif · AVIF image

.svgimage/svg+xml · SVG vector image

.icoimage/x-icon · Favicon / Windows icon

.bmpimage/bmp · Bitmap image

.tifimage/tiff · TIFF image

.tiffimage/tiff · TIFF image

.jp2image/jp2 · JPEG 2000 image

.heicimage/heic · HEIC photo (Apple)

.heifimage/heif · HEIF image

.curimage/x-icon · Windows cursor

.mp3audio/mpeg · MP3 audio

.wavaudio/wav · WAV audio

.oggaudio/ogg · Ogg audio

.ogaaudio/ogg · Ogg audio

.m4aaudio/mp4 · AAC audio in MP4 container

.aacaudio/aac · AAC audio

.flacaudio/flac · FLAC lossless audio

.opusaudio/opus · Opus audio

.midaudio/midi · MIDI music file

.midiaudio/midi · MIDI music file

.webaaudio/webm · WebM audio

.mp4video/mp4 · MP4 video

.webmvideo/webm · WebM video

.ogvvideo/ogg · Ogg video

.movvideo/quicktime · QuickTime movie

.avivideo/x-msvideo · AVI video

.mkvvideo/x-matroska · Matroska video

.m4vvideo/x-m4v · MP4 video (Apple variant)

.3gpvideo/3gpp · 3GPP mobile video

.tsvideo/mp2t · MPEG transport stream

.m3u8application/vnd.apple.mpegurl · HLS playlist

.mpdapplication/dash+xml · MPEG-DASH manifest

.pdfapplication/pdf · PDF document

.docapplication/msword · Word document (legacy)

.docxapplication/vnd.openxmlformats-officedocument.wordprocessingml.document · Word document

.xlsapplication/vnd.ms-excel · Excel spreadsheet (legacy)

.xlsxapplication/vnd.openxmlformats-officedocument.spreadsheetml.sheet · Excel spreadsheet

.pptapplication/vnd.ms-powerpoint · PowerPoint presentation (legacy)

.pptxapplication/vnd.openxmlformats-officedocument.presentationml.presentation · PowerPoint presentation

.odtapplication/vnd.oasis.opendocument.text · OpenDocument text

.odsapplication/vnd.oasis.opendocument.spreadsheet · OpenDocument spreadsheet

.odpapplication/vnd.oasis.opendocument.presentation · OpenDocument presentation

.rtfapplication/rtf · Rich Text Format

.epubapplication/epub+zip · EPUB ebook

.mobiapplication/x-mobipocket-ebook · Mobipocket ebook

.azw3application/vnd.amazon.ebook · Kindle ebook

.texapplication/x-tex · LaTeX source

.zipapplication/zip · ZIP archive

.gzapplication/gzip · Gzip archive

.tarapplication/x-tar · Tar archive

.rarapplication/vnd.rar · RAR archive

.7zapplication/x-7z-compressed · 7-Zip archive

.bz2application/x-bzip2 · Bzip2 archive

.xzapplication/x-xz · XZ archive

.jarapplication/java-archive · Java archive

.warapplication/java-archive · Java web archive

.exeapplication/x-msdownload · Windows executable

.msiapplication/x-msdownload · Windows installer

.dmgapplication/x-apple-diskimage · macOS disk image

.isoapplication/x-iso9660-image · ISO disk image

.debapplication/vnd.debian.binary-package · Debian package

.rpmapplication/x-rpm · RPM package

.apkapplication/vnd.android.package-archive · Android app package

.binapplication/octet-stream · Generic binary data

.wofffont/woff · WOFF web font

.woff2font/woff2 · WOFF2 web font

.ttffont/ttf · TrueType font

.otffont/otf · OpenType font

.eotapplication/vnd.ms-fontobject · Embedded OpenType font (legacy IE)

.sqlapplication/sql · SQL script

.yamlapplication/yaml · YAML data

.ymlapplication/yaml · YAML data

.tomlapplication/toml · TOML config

.shapplication/x-sh · Shell script

.phpapplication/x-httpd-php · PHP script

.pytext/x-python · Python source

.rssapplication/rss+xml · RSS feed

.atomapplication/atom+xml · Atom feed

.opmltext/x-opml · OPML outline

.svgzimage/svg+xml · Compressed SVG (gzip transport)

.glbmodel/gltf-binary · glTF 3D model (binary)

.gltfmodel/gltf+json · glTF 3D model (JSON)

.stlmodel/stl · STL 3D model

.torrentapplication/x-bittorrent · BitTorrent file

.pemapplication/x-pem-file · PEM certificate or key

.crtapplication/x-x509-ca-cert · X.509 certificate

.derapplication/x-x509-ca-cert · X.509 certificate (DER)

.keyapplication/octet-stream · Private key file (generic)

// MIME TYPE LOOKUP · AT A GLANCE

MIME Type Lookup: what to know first.

Find the MIME type for any file extension, and back

01
Every upload form, API response and static file server depends on MIME types being right, yet the exact string for less common formats (is it font/woff2 or application/font-woff?) is impossible to memorise. The MIME Type Lookup keeps a searchable table of the types developers actually use, covering web documents, images including WebP and AVIF, audio, video, fonts, archives, office documents and data formats.
02
Search in either direction: by extension when you know the file, or by MIME type when you are reading a header and want to know what it belongs to. Click a row to copy the type straight into your fetch headers, Express res.type, nginx mime.types entry or upload validation list.

// MIME TYPE LOOKUP · HOW IT WORKS

How to use the MIME Type Lookup

Search an extension or type

Type an extension like .woff2 or a type like video/mp4 in the search box.

Find the match

Read the matching extensions, MIME types and descriptions.

Copy the MIME type

Click any row to copy its MIME type for your code or server config.

// MIME TYPE LOOKUP · ABOUT THIS TOOL

About the MIME Type Lookup

Upload forms, APIs and file servers depend on getting MIME types right, but the exact strings are impossible to memorise. This lookup keeps a searchable table of the types developers actually use, across web, image, audio, video, font, archive and office formats.

Search by extension or by MIME type, and click any row to copy the type straight into your headers or config.

Where it helps most

Concrete, recurring situations.

Broken fonts

A font file served as generic binary fails in strict browsers until the server declares font/woff2.

Video downloads

A video that downloads instead of playing usually traces to a missing or wrong video/mp4 header.

API confusion

An API returning JSON as text/plain confuses clients that sniff the content type before parsing.

Server config

In each case the fix is a one-line server configuration, but you have to know the exact type string first.

What you learn

Beyond the single answer.

Full working set

Image formats from JPEG to AVIF, video and audio types, font formats, documents, archives and text formats.

Generic fallback

application/octet-stream means binary, just download it: the right answer when no specific type exists.

Extension versus type

The extension is a naming convention; the MIME type is the authoritative label, and when they disagree the type wins.

MIME Type Lookup: built for trust

The standard content type for any extension, instantly. No signup needed.

// MIME TYPE LOOKUP · COMMON QUESTIONS

MIME Type Lookup FAQs

What is a MIME type?

A MIME type, more precisely called a media type, is the label a server sends with each file to say what kind of content it is, such as text/html for pages or image/png for images. Browsers use it to decide whether to display, play, or download the file.

Why does my file download instead of displaying in the browser?

What does application/octet-stream mean?

Can two extensions share the same MIME type?

Is the file extension the same thing as the MIME type?

tools-guide

WHOIS Lookup: Find Out Who Owns Any Domain Instantly

Free WHOIS lookup for any domain. Check the registrar, registration and expiry dates, name servers and the full WHOIS record instantly, no sign-up needed.

Read article →

tools-guide

DNS Lookup: Free Online DNS Record Checker for Any Domain

Free online DNS lookup tool. Check A, AAAA, MX, TXT, CNAME, NS and SOA records for any domain instantly. Fast, private, accurate, no sign-up required.

Read article →

Use MIME Type Lookup

How to use the MIME Type Lookup

Search an extension or type

Find the match

Copy the MIME type

About the MIME Type Lookup

Where it helps most

Broken fonts

Video downloads

API confusion

Server config

What you learn

Full working set

Generic fallback

Extension versus type

MIME Type Lookup: built for trust

MIME Type Lookup FAQs

Related tools

Learn more about MIME Type Lookup

WHOIS Lookup: Find Out Who Owns Any Domain Instantly

DNS Lookup: Free Online DNS Record Checker for Any Domain