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MIME type lookup

Look up extensions and media types using a bundled local database.

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Extension, filename, or MIME type

Result

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Using this tool

Look up media types by extension or common extensions by MIME type.

Actions: Process

Example

Look up .json; the result includes application/json.

Example action and settings

Action: Process

Input / action

.json

Result / expected behavior

{
  "extension": "json",
  "mimeTypes": [
    "application/json"
  ]
}

Scope and limitations

Uses a bundled local database; it does not inspect file bytes or guarantee the server sends that type.

Common mistakes

An extension may map to several types. An unknown extension does not mean the file is invalid.

Related tools

Base64 file converter

Privacy and browser support

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