MIME Type Helper
Look up the MIME (media) type for a file extension, or the extensions for a MIME type, from a curated IANA/MDN reference table.
This tool handles input and primary processing in your browser and is designed not to send the input to QuickKit’s server.
Matches
How it works
Enter a file extension or file name to get its MIME type, or a MIME type (with or without parameters like "; charset=utf-8") to get its extensions. The table is a curated reference drawn from the IANA Media Types registry and MDN's common-types list (checked 2026-09-01) and covers web, code, document, archive, and media formats. An extension can map to several types, and notes call out common non-standard spellings such as image/jpg. The real type an OS, browser, or web server reports for a file can still differ — they use their own databases (for example Apache mime.types, the freedesktop shared-mime-info database, or the Windows registry) and, in a browser upload, often the OS mapping or content sniffing. This is a reference — a file's actual bytes decide its type (see the Magic Number Reference).