MIME (Multipurpose Internet Mail Extensions) types are standardised identifiers for the format of a file. They are used in HTTP Content-Type headers, HTML meta tags, file upload validation, and email attachments to tell the recipient what kind of data they are receiving.

What is the format of a MIME type string?

A MIME type consists of a type and a subtype separated by a slash: type/subtype. For example, text/html, image/jpeg, or application/json. An optional parameter may follow, like charset=utf-8 for text types.

What MIME type should I use for JSON?

The correct MIME type for JSON is application/json. This is the standard defined in RFC 4627 and used by virtually all APIs and frameworks.

What is the difference between text/plain and application/octet-stream?

text/plain tells the browser or client that the data is plain readable text. application/octet-stream is a generic binary type used when the specific format is unknown or when you want to force a download rather than inline rendering.

Why does my server send the wrong MIME type?

Servers determine MIME types based on file extension mappings in their configuration. If a type is missing or incorrectly mapped, you may need to update the mime.types file or the server configuration for that extension.

What MIME type should I use for SVG files?

SVG files should use image/svg+xml. Using the wrong type (like image/svg) may cause browsers to download the file rather than render it inline.

What MIME type is used for web fonts?

WOFF files use font/woff, WOFF2 uses font/woff2, TTF uses font/ttf, and OTF uses font/otf. These are the registered IANA types for web fonts.

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MIME Types Reference

Searchable reference for 100+ MIME types. Look up by extension, type string, or description.

Extension Lookup

MIME Type Lookup

application/jsonApplication

JSON data interchange format

.json

application/ld+jsonApplication

JSON-LD linked data format

.jsonld

application/pdfApplication

Portable Document Format

.pdf

application/xmlApplication

XML data

.xml

application/zipApplication

ZIP compressed archive

.zip

application/gzipApplication

GZIP compressed data

.gz.gzip

application/x-tarApplication

TAR archive

.tar

application/x-7z-compressedApplication

7-Zip compressed archive

.7z

application/vnd.rarApplication

RAR compressed archive

.rar

application/wasmApplication

WebAssembly binary

.wasm

application/octet-streamApplication

Arbitrary binary data / unknown file type

.bin.exe.dll

application/x-www-form-urlencodedApplication

URL-encoded form data

application/graphqlApplication

GraphQL query language

.graphql.gql

application/x-msgpackApplication

MessagePack binary serialization

.msgpack.mp

application/protobufApplication

Protocol Buffers binary format

.proto.pb

application/oggApplication

OGG multimedia container

.ogx

application/epub+zipApplication

EPUB electronic publication

.epub

application/vnd.ms-excelApplication

Microsoft Excel (legacy)

.xls.xlt

application/vnd.openxmlformats-officedocument.spreadsheetml.sheetApplication

Microsoft Excel Open XML spreadsheet

.xlsx

application/mswordApplication

Microsoft Word (legacy)

.doc.dot

application/vnd.openxmlformats-officedocument.wordprocessingml.documentApplication

Microsoft Word Open XML document

.docx

application/vnd.ms-powerpointApplication

Microsoft PowerPoint (legacy)

.ppt.pps

application/vnd.openxmlformats-officedocument.presentationml.presentationApplication

Microsoft PowerPoint Open XML presentation

.pptx

application/javascriptApplication

JavaScript (legacy MIME type)

.js.mjs

application/typescriptApplication

TypeScript source code

.ts

application/sqlApplication

SQL query or script

.sql

application/x-httpd-phpApplication

PHP server-side script

.php

application/vnd.apple.mpegurlApplication

Apple HLS streaming playlist

.m3u8

application/dash+xmlApplication

MPEG-DASH adaptive streaming manifest

.mpd

application/x-bzip2Application

BZIP2 compressed data

.bz2

application/x-shockwave-flashApplication

Adobe Flash (deprecated)

.swf

application/vnd.sqlite3Application

SQLite database file

.sqlite.sqlite3.db

text/htmlText

HTML document

.html.htm

text/cssText

Cascading Style Sheets

.css

text/javascriptText

JavaScript source code

.js.mjs.cjs

text/typescriptText

TypeScript source code

.ts.tsx

text/plainText

Plain text

.txt.log.conf

text/csvText

Comma-separated values

.csv

text/xmlText

XML text data

.xml.xsl

text/markdownText

Markdown text format

.md.markdown

text/yamlText

YAML data serialization

.yaml.yml

text/x-pythonText

Python source code

.py

text/x-java-sourceText

Java source code

.java

text/x-cText

C source code

.c.h

text/x-c++srcText

C++ source code

.cpp.cc.cxx

text/x-shText

Shell script

.sh.bash.zsh

text/x-rubyText

Ruby source code

.rb

text/x-goText

Go source code

.go

text/x-rustText

Rust source code

.rs

text/tab-separated-valuesText

Tab-separated values

.tsv

text/calendarText

iCalendar event data

.ics.ical

text/vcardText

vCard contact data

.vcf.vcard

text/richtextText

Rich text format

.rtx

text/x-tomlText

TOML configuration format

.toml

text/x-sqlText

SQL text

.sql

image/jpegImage

JPEG image

.jpg.jpeg.jfif

image/pngImage

PNG image

.png

image/gifImage

GIF image (animated or static)

.gif

image/webpImage

WebP image format

.webp

image/svg+xmlImage

Scalable Vector Graphics

.svg.svgz

image/x-iconImage

ICO icon file

.ico

image/bmpImage

BMP bitmap image

.bmp

image/tiffImage

TIFF image

.tiff.tif

image/avifImage

AVIF image (AV1-based)

.avif

image/heicImage

HEIC image (Apple devices)

.heic

image/heifImage

HEIF image container

.heif

image/apngImage

Animated PNG

.apng

image/x-xcfImage

GIMP image file

.xcf

image/x-rawImage

Camera raw image data

.raw.cr2.nef

image/jxlImage

JPEG XL next-generation image

.jxl

audio/mpegAudio

MP3 audio

.mp3.mpga

audio/oggAudio

OGG Vorbis audio

.oga.ogg

audio/wavAudio

WAV uncompressed audio

.wav

audio/webmAudio

WebM audio

.webm

audio/aacAudio

AAC audio (Advanced Audio Coding)

.aac.m4a

audio/flacAudio

FLAC lossless audio

.flac

audio/x-aiffAudio

AIFF audio (Apple)

.aiff.aif

audio/midiAudio

MIDI music data

.mid.midi

audio/opusAudio

Opus compressed audio

.opus

audio/x-ms-wmaAudio

Windows Media Audio

.wma

audio/x-m4aAudio

M4A audio container (AAC)

.m4a

audio/amrAudio

AMR adaptive multi-rate audio

.amr

video/mp4Video

MP4 video container

.mp4.m4v

video/webmVideo

WebM video format

.webm

video/oggVideo

OGG Theora video

.ogv

video/quicktimeVideo

Apple QuickTime video

.mov.qt

video/x-msvideoVideo

AVI video (Audio Video Interleave)

.avi

video/x-ms-wmvVideo

Windows Media Video

.wmv

video/mpegVideo

MPEG video

.mpeg.mpg

video/3gppVideo

3GPP video (mobile)

.3gp

video/x-flvVideo

Flash Video (deprecated)

.flv

video/x-matroskaVideo

Matroska multimedia container

.mkv

video/av1Video

AV1 video codec

.av1

video/MP2TVideo

MPEG-2 transport stream

.ts.mts

font/woffFont

Web Open Font Format 1.0

.woff

font/woff2Font

Web Open Font Format 2.0 (Brotli compressed)

.woff2

font/ttfFont

TrueType font

.ttf

font/otfFont

OpenType font

.otf

font/collectionFont

TrueType/OpenType font collection

.ttc

font/sfntFont

SFNT font format

.sfnt

multipart/form-dataMultipart

Multipart form data (file uploads)

multipart/byterangesMultipart

Multipart byte ranges (partial content)

multipart/mixedMultipart

Multipart mixed content

multipart/alternativeMultipart

Multipart alternative representations (e.g. email HTML+text)

multipart/digestMultipart

Multipart digest (message collection)

multipart/relatedMultipart

Multipart related content (MHTML, etc.)

MIME type lookup: find the correct Content-Type for any file extension

Sending the correct Content-Type header is essential for browsers, API clients, and email programs to handle data correctly. Using the wrong MIME type can cause files to download instead of display, APIs to reject payloads, or email attachments to break. This reference lets you look up the correct MIME type for any file extension or search for extensions associated with a given type.

The database covers hundreds of registered IANA media types across all major categories: images, video, audio, text, application data, fonts, archives, and more. Search results show the canonical MIME string and all common file extensions that use it, so you always have the exact value to paste into your server config or code.

Step-by-step guide

1
Search by extension or MIME type
Type a file extension (e.g. .pdf, .mp4) or a MIME type string (e.g. image/webp) into the search box to filter the list.
2
Browse by category
Use the category filters to browse MIME types for images, video, audio, text, application data, fonts, or archives.
3
View the full MIME string
Each result shows the canonical MIME type string exactly as it should appear in a Content-Type HTTP header.
4
Check associated extensions
See all common file extensions that map to a given MIME type: useful when a type has multiple associated extensions.
5
Copy the MIME string
Click Copy to put the MIME type string on your clipboard for use in server configuration, API responses, or code.

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Frequently Asked Questions

What is a MIME type?: MIME (Multipurpose Internet Mail Extensions) types are standardised identifiers for the format of a file. They are used in HTTP Content-Type headers, HTML meta tags, file upload validation, and email attachments to tell the recipient what kind of data they are receiving.
What is the format of a MIME type string?: A MIME type consists of a type and a subtype separated by a slash: type/subtype. For example, text/html, image/jpeg, or application/json. An optional parameter may follow, like charset=utf-8 for text types.
What MIME type should I use for JSON?: The correct MIME type for JSON is application/json. This is the standard defined in RFC 4627 and used by virtually all APIs and frameworks.
What is the difference between text/plain and application/octet-stream?: text/plain tells the browser or client that the data is plain readable text. application/octet-stream is a generic binary type used when the specific format is unknown or when you want to force a download rather than inline rendering.
Why does my server send the wrong MIME type?: Servers determine MIME types based on file extension mappings in their configuration. If a type is missing or incorrectly mapped, you may need to update the mime.types file or the server configuration for that extension.
What MIME type should I use for SVG files?: SVG files should use image/svg+xml. Using the wrong type (like image/svg) may cause browsers to download the file rather than render it inline.
What MIME type is used for web fonts?: WOFF files use font/woff, WOFF2 uses font/woff2, TTF uses font/ttf, and OTF uses font/otf. These are the registered IANA types for web fonts.
Is this tool free?: Yes, completely free with no account, no sign-up, and no usage limits.

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