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File helpers

MIME Type Lookup

Look up common file extensions associated with a MIME type in a built-in reference table.

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How it works

Look up common file extensions associated with a MIME type in a built-in reference table. Enter your values or try the example. Run the action, check the result and copy or download it. Your input remains editable after an error.

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Example

image/jpeg → .jpg, .jpeg, .jpe
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When to use this tool

Find common extensions for a Content-Type value from an HTTP header.

Supported formats & limits

Reference table only; an extension does not prove the file’s actual type.

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Good to know

What happens when I change the input?

An edited input needs a new result. Run the action again; previous download links are removed so you cannot mistake an old output for the current one.

Are my files uploaded?

Your files and pasted content are processed in temporary browser memory and are not uploaded for processing. App preferences store only tool IDs, language and theme. There are no accounts, ads or automatic error reports. Closing the page discards your workspace; download results you want to keep. Production pages use Google Analytics for visit statistics; see the Privacy page for details.