MIME

MIME Type Lookup

Look up MIME types by extension or reverse lookup extensions from MIME names.

Lookup Input

Use extension or MIME mode to resolve file type metadata quickly.

Lookup Results

Canonical MIME entries with extension and category information.

application/json

application

MIME: application/json

Extensions: json, map

Category: application

application/ld+json

application

MIME: application/ld+json

Extensions: jsonld

Category: application

application/geo+json

application

MIME: application/geo+json

Extensions: geojson

Category: application

application/x-ndjson

application

MIME: application/x-ndjson

Extensions: ndjson

Category: application

What

MIME Type Lookup definition

MIME types describe media formats for files and HTTP content negotiation. This lookup tool helps you verify canonical MIME labels and commonly used file extensions.

Cases

Use Cases

Check Content-Type values when building API responses

Map uploaded file extensions to expected MIME types

Verify download headers for static assets

Document accepted file formats in product requirements

Troubleshoot browser rendering issues caused by wrong MIME

Prepare validation rules for file upload pipelines

How To

How to Use MIME Lookup

Choose lookup mode, enter a query, and inspect canonical MIME details.

Select mode

Use Extension -> MIME or MIME -> Extensions mode based on your input.

Search

Enter an extension or MIME name and click Search. Query is normalized automatically.

Copy results

Copy canonical MIME labels or extension lists directly from result cards.

Knowledge

MIME Lookup Knowledge

Canonical MIME Labels

Canonical MIME names improve interoperability across browsers, CDNs, storage, and API clients.

Extension Ambiguity

A single extension can represent multiple MIME labels depending on platform or historical usage.

Validation Strategy

For secure uploads, combine extension checks with server-side content sniffing and policy checks.

FAQ

How many MIME types are included?

This tool includes a broad static set of major MIME types used in web, app, media, and document workflows.

Can one extension map to multiple MIME types?

Yes. Some extensions are ambiguous across ecosystems, so multiple candidates can appear.

Is this list fetched from a remote service at runtime?

No. The data is bundled statically and queried locally in the browser.

Should I always trust extension-only detection?

No. Extension-based detection is useful but should be combined with content validation for security-sensitive flows.

Why is my query normalized?

Normalization removes leading dots and lowercases values for consistent matching.

Can I use this for upload validation rules?

Yes. It is useful for defining allow-lists and validating expected MIME labels.

Network Tools

View all →

DNS Lookup

Perform DNS lookups (A, MX, TXT, etc.) for any domain.

IP & Location Lookup

See your current public IP, ISP, and approximate location.

CIDR / Subnet Calculator

Enter an IPv4 CIDR to instantly calculate the network address, broadcast address, and host range.

User Agent Parser

Analyze browser, OS, device, and engine details from any user agent string.