MIME Type Lookup
Find MIME types online from file extensions or reverse lookup extensions from MIME values.
About This Tool
This free online MIME type lookup helps you map file extensions to correct content-type headers and perform reverse lookup from MIME values. It is useful for API integrations, upload validation, server configuration, and debugging file-serving issues in modern web applications.
Enter an extension such as .svg or a MIME value like application/json to get the matching result instantly. Processing is local in-browser and no query data is stored on IO Tools servers.