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File Extension / MIME Type Lookup
Search a file extension or a MIME type to see what it actually means.
56 results
MIME type: image/jpeg
Category: image
Compressed photo, the default from most cameras and phones.
MIME type: image/jpeg
Category: image
Same format as .jpg, just a longer extension.
MIME type: image/png
Category: image
Lossless image with transparency support, common for graphics and screenshots.
MIME type: image/gif
Category: image
Low-color image format, widely used for short looping animations.
MIME type: image/webp
Category: image
Modern image format with better compression than JPEG/PNG at similar quality.
MIME type: image/svg+xml
Category: image
Vector image described in XML — scales to any size without quality loss.
MIME type: image/bmp
Category: image
Uncompressed raster image, large file sizes.
MIME type: image/vnd.microsoft.icon
Category: image
Icon format used for favicons and Windows application icons.
MIME type: image/tiff
Category: image
High-quality uncompressed image format, common in printing and scanning.
MIME type: image/heic
Category: image
Apple's default photo format on modern iPhones — smaller than JPEG at similar quality.
MIME type: application/pdf
Category: document
Portable Document Format — fixed layout, readable on virtually any device.
MIME type: application/msword
Category: document
Legacy Microsoft Word document format.
MIME type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
Category: document
Modern Microsoft Word document (Office Open XML).
MIME type: application/vnd.ms-excel
Category: document
Legacy Microsoft Excel spreadsheet format.
MIME type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Category: document
Modern Microsoft Excel spreadsheet (Office Open XML).
MIME type: application/vnd.ms-powerpoint
Category: document
Legacy Microsoft PowerPoint presentation format.
MIME type: application/vnd.openxmlformats-officedocument.presentationml.presentation
Category: document
Modern Microsoft PowerPoint presentation (Office Open XML).
MIME type: text/plain
Category: document
Plain, unformatted text — opens in any text editor.
MIME type: text/csv
Category: document
Comma-separated values — a plain-text table, common for spreadsheet exports.
MIME type: application/rtf
Category: document
Rich Text Format — basic formatting, readable by most word processors.
MIME type: application/vnd.oasis.opendocument.text
Category: document
OpenDocument Text — the open-standard equivalent of .docx.
MIME type: application/epub+zip
Category: document
Reflowable e-book format, supported by most e-readers except Kindle.
MIME type: video/mp4
Category: video
The most widely supported video container, used across web and mobile.
MIME type: video/quicktime
Category: video
Apple's QuickTime video format, the default from iPhone cameras.
MIME type: video/x-msvideo
Category: video
Older Windows video container, large file sizes by modern standards.
MIME type: video/x-matroska
Category: video
Open container format supporting multiple audio/subtitle tracks, common for downloads.
MIME type: video/webm
Category: video
Open, royalty-free video format optimized for the web.
MIME type: video/x-ms-wmv
Category: video
Legacy Windows Media video format.
MIME type: audio/mpeg
Category: audio
The most common compressed audio format, small size with modest quality loss.
MIME type: audio/wav
Category: audio
Uncompressed audio — large files, used for editing and production.
MIME type: audio/flac
Category: audio
Lossless compressed audio — smaller than WAV, no quality loss.
MIME type: audio/aac
Category: audio
Compressed audio format, generally better quality than MP3 at the same bitrate.
MIME type: audio/ogg
Category: audio
Open-source compressed audio format.
MIME type: audio/mp4
Category: audio
Compressed audio in an MP4 container, common for Apple Music and podcasts.
MIME type: application/zip
Category: archive
The most universally supported compressed archive format.
MIME type: application/vnd.rar
Category: archive
Proprietary compressed archive format, needs dedicated software to extract on most OSes.
MIME type: application/x-7z-compressed
Category: archive
Open-source archive format with high compression ratios.
MIME type: application/x-tar
Category: archive
Bundles files together without compressing them — common on Unix/Linux.
MIME type: application/gzip
Category: archive
Gzip-compressed file, often paired with .tar as .tar.gz.
MIME type: text/javascript
Category: code
JavaScript source code.
MIME type: video/mp2t
Category: code
As a code file, TypeScript source; as a video file, an MPEG transport stream segment.
MIME type: text/x-python
Category: code
Python source code.
MIME type: text/html
Category: code
HTML markup — the structure of a web page.
MIME type: text/css
Category: code
Cascading Style Sheets — the styling of a web page.
MIME type: application/json
Category: code
Structured data format, widely used for APIs and configuration.
MIME type: application/xml
Category: code
Structured markup format used for data exchange and configuration.
MIME type: application/yaml
Category: code
Human-readable data format, common for configuration files (also .yml).
MIME type: text/markdown
Category: code
Markdown — lightweight text formatting, common for documentation and READMEs.
MIME type: font/ttf
Category: font
TrueType font, one of the most widely supported font formats.
MIME type: font/otf
Category: font
OpenType font — supports more advanced typography features than TrueType.
MIME type: font/woff
Category: font
Web Open Font Format — compressed font optimized for web pages.
MIME type: font/woff2
Category: font
The successor to WOFF, with better compression for web fonts.
MIME type: application/vnd.microsoft.portable-executable
Category: other
Windows executable program.
MIME type: application/x-apple-diskimage
Category: other
macOS disk image, the standard way Mac apps are distributed.
MIME type: application/x-iso9660-image
Category: other
Disk image containing the full contents of an optical disc or installer.
MIME type: application/vnd.android.package-archive
Category: other
Android application package, used to install apps outside the Play Store.
A file extension is a convention, not a guarantee — the three letters after the dot are just a hint to your operating system about how to open the file. The MIME type is the more precise, standardized identifier that browsers, email clients and APIs actually rely on to know what they're dealing with.
This is a quick reference for common extensions across documents, images, video, audio, archives, code and fonts — search either the extension or the MIME type to find the other.
How to use it
- 01Type a file extension (for example “pdf” or “.pdf”) or a MIME type (for example “image/png”).
- 02Results update as you type, matching either field.
- 03Each result shows the canonical MIME type, category and a short description.
Frequently asked questions
What is a MIME type?
MIME (Multipurpose Internet Mail Extensions) type is a standardized string like “image/png” or “application/pdf” that identifies a file's format. Unlike a file extension, it's what browsers, servers and APIs actually use to decide how to handle a file.
Can a file extension have more than one MIME type, or vice versa?
Yes, in some cases. A .ts file, for example, is a TypeScript source file in most contexts but an MPEG transport stream video segment in video/streaming contexts — the surrounding context, not just the extension, determines which is meant.
Why do file extensions matter if MIME types are more precise?
Extensions are still what most operating systems and users rely on day to day to decide which app opens a file. MIME types matter more behind the scenes — in HTTP responses, email attachments and API uploads — where precision actually affects whether something works.
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