Why do .jpg and .jpeg both appear?

They are the same format (image/jpeg) with two historical extensions. The table lists each extension because servers and operating systems treat them as separate filenames.

What type should I serve for .ts files?

There is no IANA type for TypeScript; this tool maps it to text/x-typescript and notes the caveat that some registries use video/mp2t (MPEG transport streams) for that extension — a classic gotcha.

Is this the complete IANA registry?

No — it is a curated 120-entry map of the types developers actually meet. The full registry has thousands of entries; this covers the ones worth memorizing.

Does the lookup work offline?

Yes. The mapping is compiled into the page; there is no API call, so results are instant and available without connectivity.

MIME Type Lookup

NewText & Code Tools100% Private · In-Browser

A curated offline map of 120 common MIME types — search by extension or content type, filtered by category, with usage notes.

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Key features

120 entries covering images, video, audio, documents, fonts, archives, data formats, code files and web-critical types — webp, woff2, mp4, json and friends included.
One search box works both directions: type “webp” to find its type, or “image/webp” — or just “image” — to list matching extensions.
Ten category filter chips (Image, Video, Audio, Document, Font, Archive, Data, Code, Web, Other) narrow the table instantly.
Every row shows the extension, the MIME type, its category badge and a one-line real-world usage note, with a copy control per row.
Fully offline: the mapping ships with the page, so it works on a plane, in a restricted network, and at zero latency.

How it works

Search by extension or type
Type a dotted or bare extension (.webp / webp) or any part of a MIME type (font, application/json). Matching is instant and case-insensitive.
Filter by category
Tap a category chip to see only that family — all fonts, all archives — or keep “All” and scan the table.
Copy what you need
Each row copies its “type — .ext” pair, ready to paste into a server config, .htaccess, or an Accept header.

Tips for better results

When a server sends a wrong Content-Type, browsers may refuse the resource (scripts, styles) — verifying the type here is step one of that debugging.
text/javascript is the modern standard for JS files; older text/x-javascript and application/javascript aliases still appear in legacy configs.
Unknown extensions aren't failures: if it's not in this curated list, registries like IANA's are the next stop — the note column tells you which entries are convention-based.

Frequently asked questions

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Key features

120 entries covering images, video, audio, documents, fonts, archives, data formats, code files and web-critical types — webp, woff2, mp4, json and friends included.

One search box works both directions: type “webp” to find its type, or “image/webp” — or just “image” — to list matching extensions.

Ten category filter chips (Image, Video, Audio, Document, Font, Archive, Data, Code, Web, Other) narrow the table instantly.

Every row shows the extension, the MIME type, its category badge and a one-line real-world usage note, with a copy control per row.

Fully offline: the mapping ships with the page, so it works on a plane, in a restricted network, and at zero latency.

How it works

Search by extension or type

Type a dotted or bare extension (.webp / webp) or any part of a MIME type (font, application/json). Matching is instant and case-insensitive.

Filter by category

Tap a category chip to see only that family — all fonts, all archives — or keep “All” and scan the table.

Copy what you need

Each row copies its “type — .ext” pair, ready to paste into a server config, .htaccess, or an Accept header.

Tips for better results

When a server sends a wrong Content-Type, browsers may refuse the resource (scripts, styles) — verifying the type here is step one of that debugging.

text/javascript is the modern standard for JS files; older text/x-javascript and application/javascript aliases still appear in legacy configs.

Unknown extensions aren't failures: if it's not in this curated list, registries like IANA's are the next stop — the note column tells you which entries are convention-based.

MIME Type Lookup

Key features

How it works

Search by extension or type

Filter by category

Copy what you need

Tips for better results

Frequently asked questions

Explore all 101 tools

MIME Type Lookup

Search the registry

Matching types

Key features

How it works

Search by extension or type

Filter by category

Copy what you need

Tips for better results

Frequently asked questions

Explore all 101 tools

Search the registry

Matching types

MIME Type Lookup

Key features

How it works

Search by extension or type

Filter by category

Copy what you need

Tips for better results

Frequently asked questions

Why do .jpg and .jpeg both appear?

What type should I serve for .ts files?

Is this the complete IANA registry?

Does the lookup work offline?

More Text & Code Tools

Explore all 101 tools

MIME Type Lookup

Search the registry

Matching types

Key features

How it works

Search by extension or type

Filter by category

Copy what you need

Tips for better results

Frequently asked questions

Why do .jpg and .jpeg both appear?

What type should I serve for .ts files?

Is this the complete IANA registry?

Does the lookup work offline?

More Text & Code Tools

Explore all 101 tools

Search the registry

Matching types