A MIME type (or media type) is a two-part identifier — type/subtype — that tells the receiver what format a piece of data is in. Originally created for email (Multipurpose Internet Mail Extensions, RFC 2045), it is now ubiquitous in HTTP, where the Content-Type header defines how the browser interprets content.
MIME Type Checker
Look up MIME types by extension, name or IANA type
The standard that identifies the format of any file on the internet
A MIME type (Multipurpose Internet Mail Extensions) is the IANA-standardised identifier for a content format — used in HTTP headers (Content-Type), emails, file uploads and APIs. The structure is type/subtype, such as image/jpeg or application/json. This checker covers the most common types from the IANA registry and practical web use.
Instant search by extension or type
- Type a file extension without a dot (e.g. pdf, mp4, webp) or the full MIME type (e.g. application/json).
- Results appear in real time showing the canonical MIME type, description, IANA category and associated extensions.
- Use the copy button to copy the exact MIME type for use in code or server configuration.
Sources and references for this tool
These references help contextualize formulas, standards, APIs and limitations used on this page. They do not replace professional validation when a result has legal, financial, medical or operational impact.
- IANA Media Types RegistryIANA — Official registry of all IANA-recognised media types (MIME).
- RFC 2045 — MIME Part OneIETF — Original MIME (Multipurpose Internet Mail Extensions) specification.
- RFC 6838 — Media Type Specifications and Registration ProceduresIETF — Procedures for registering new media types with IANA.