Free File Type & MIME Explainer

Look up any file extension and its MIME type.

Runs locallyNo uploadPrivate

Feedback Report issue

.htmltext/htmlWeb

HyperText Markup Language — the structure of a web page.

.csstext/cssWeb

Cascading Style Sheets — styles for web pages.

.jstext/javascriptWeb

JavaScript source — code that runs in browsers and Node.

.jsonapplication/jsonData

JavaScript Object Notation — a common data-exchange format.

.xmlapplication/xmlData

Extensible Markup Language — structured, tag-based data.

.csvtext/csvData

Comma-separated values — tabular data as plain text.

.txttext/plainText

Plain text with no formatting.

.mdtext/markdownText

Markdown — lightweight text formatting.

.pdfapplication/pdfDocument

Portable Document Format — fixed-layout documents.

.docapplication/mswordDocument

Legacy Microsoft Word document.

.docxapplication/vnd.openxmlformats-officedocument.wordprocessingml.documentDocument

Modern Microsoft Word document (Office Open XML).

.xlsapplication/vnd.ms-excelDocument

Legacy Microsoft Excel spreadsheet.

.xlsxapplication/vnd.openxmlformats-officedocument.spreadsheetml.sheetDocument

Modern Microsoft Excel spreadsheet.

.pptapplication/vnd.ms-powerpointDocument

Legacy Microsoft PowerPoint presentation.

.pptxapplication/vnd.openxmlformats-officedocument.presentationml.presentationDocument

Modern Microsoft PowerPoint presentation.

.pngimage/pngImage

Lossless raster image with transparency.

.jpgimage/jpegImage

Compressed photo image (also .jpeg).

.jpegimage/jpegImage

Compressed photo image.

.gifimage/gifImage

Indexed image supporting simple animation.

.webpimage/webpImage

Modern image format with strong compression.

.avifimage/avifImage

Next-gen image format with excellent compression.

.svgimage/svg+xmlImage

Scalable Vector Graphics — resolution-independent vectors.

.heicimage/heicImage

High-Efficiency image (Apple iPhone photos).

.icoimage/x-iconImage

Icon file, used for favicons.

.tiffimage/tiffImage

High-quality raster image, common in print/scanning.

.mp3audio/mpegAudio

Compressed audio — the classic music format.

.wavaudio/wavAudio

Uncompressed audio.

.oggaudio/oggAudio

Open, compressed audio container.

.mp4video/mp4Video

The most common video container (H.264/H.265).

.webmvideo/webmVideo

Open video format for the web.

.movvideo/quicktimeVideo

Apple QuickTime video container.

.avivideo/x-msvideoVideo

Legacy Windows video container.

.zipapplication/zipArchive

Compressed archive of one or more files.

.gzapplication/gzipArchive

Gzip-compressed file, common on Unix.

.tarapplication/x-tarArchive

Uncompressed archive bundle (often paired with gzip).

.rarapplication/vnd.rarArchive

RAR compressed archive.

.7zapplication/x-7z-compressedArchive

7-Zip archive with high compression.

.woff2font/woff2Font

Web Open Font Format 2 — the standard web font.

.ttffont/ttfFont

TrueType font.

.otffont/otfFont

OpenType font.

.wasmapplication/wasmCode

WebAssembly binary — near-native code for the browser.

.yamlapplication/yamlData

YAML — human-friendly config/data format (also .yml).

.sqlapplication/sqlCode

SQL script — database queries and schema.

Look up what a file extension is and the MIME (Content-Type) it maps to — handy for HTTP headers, uploads and <input accept>. Runs in your browser.

Loading tool…

About the File Type & MIME Explainer

Free file type and MIME type lookup. Search any extension — heic, docx, webp, mp4 — to see its MIME (Content-Type), category and what it's for. Handy for HTTP headers and uploads. Runs in your browser.

How it works

1
Search
By extension, MIME or keyword.
2
Read the details
MIME, category and description.
3
Use it
For headers, uploads and accept filters.

Frequently asked questions

A short label like image/png or application/pdf that tells browsers and servers what kind of data a file contains. It's sent in the Content-Type HTTP header.

Modern Office files use the Office Open XML standard, whose official MIME types are long and descriptive.