MIME Type Lookup

MIME (Multipurpose Internet Mail Extensions) type is a standard that indicates the nature and format of a document or file. Browsers and servers use MIME types to handle files correctly — for example, 'text/html' tells the browser to render HTML, while 'application/octet-stream' triggers a file download.

Type the file extension (e.g., 'jpg', 'pdf', 'mp4') in the search box. The tool filters all MIME types that include that extension. You can also search by MIME type string (e.g., 'image/') or by keyword (e.g., 'video').

Use 'application/json' for JSON response bodies. For JSON-LD (linked data), use 'application/ld+json'. For form submissions, use 'application/x-www-form-urlencoded' for simple forms or 'multipart/form-data' when uploading files.

Servers validate MIME types sent in the 'Content-Type' header, not the file extension. If your client sends the wrong MIME type, the server rejects the upload. Use this tool to find the correct MIME type string and set it explicitly in your HTTP request headers.

Modern Excel files (.xlsx) use 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'. Legacy .xls uses 'application/vnd.ms-excel'. For Word: .docx is 'application/vnd.openxmlformats-officedocument.wordprocessingml.document', .doc is 'application/msword'.

'application/octet-stream' is the generic binary MIME type. When a server sends this type, the browser will prompt the user to download the file rather than trying to render it. Use it as a safe fallback when the specific MIME type is unknown.