What does MIME Type Lookup do that other Developer pages on this site do not?

Extension → MIME, or MIME → extension when known. Shows top-level type. Short version: Look up MIME by extension or reverse to extension.

Does MIME Type Lookup upload my file or text to Tool-You servers?

No. MIME Type Lookup runs in this browser tab. Files stay on the device. Limit note: Built-in table only. Unknown extensions return nothing.

Should I use File to Base64 instead of MIME Type Lookup?

Use MIME Type Lookup when you need Look up MIME by extension or reverse to extension. Use File to Base64 when you need Encode any file as a data URL. They share a category (Developer) but not the same job.

What are the limits of MIME Type Lookup?

Built-in table only. Unknown extensions return nothing. Also: Extension → MIME, or MIME → extension when known. Shows top-level type.

MIME Type Lookup

Look up MIME by extension or reverse to extension.

Extension → MIME, or MIME → extension when known. Shows top-level type.

What MIME Type Lookup does

Extension → MIME, or MIME → extension when known. Shows top-level type.

This URL is only for MIME Type Lookup (developer · mime type). Look up MIME by extension or reverse to extension. Other Developer tools on Tool-You look similar in the chrome, so the job definition below is the part that belongs to MIME Type Lookup alone: Extension → MIME, or MIME → extension when known. Shows top-level type.

How to use MIME Type Lookup

Keep this tab on MIME Type Lookup (/developer/mime-type). Pasting into the wrong Developer tool (for example File to Base64) changes the job.
Paste or type the input MIME Type Lookup expects. Path hint: developer · mime type. Look up MIME by extension or reverse to extension.
Apply the MIME Type Lookup action only. HTTP Status Phrase is a different transform (HTTP status phrase and class (1xx–5xx).). Extension → MIME, or MIME → extension when known. Shows top-level type.
Copy the output of MIME Type Lookup if you need it elsewhere. Size/complexity still follows: Built-in table only. Unknown extensions return nothing.
If the text job is actually Encode any file as a data URL., leave MIME Type Lookup and open File to Base64.

When not to use MIME Type Lookup

Skip MIME Type Lookup when a neighbor tool matches better — start with File to Base64 or HTTP Status Phrase — or when the description already warns the job will fail. In the tool’s own words: Extension → MIME, or MIME → extension when known. Shows top-level type.

Questions about MIME Type Lookup

What does MIME Type Lookup do that other Developer pages on this site do not?: Extension → MIME, or MIME → extension when known. Shows top-level type. Short version: Look up MIME by extension or reverse to extension.
Does MIME Type Lookup upload my file or text to Tool-You servers?: No. MIME Type Lookup runs in this browser tab. Files stay on the device. Limit note: Built-in table only. Unknown extensions return nothing.
Should I use File to Base64 instead of MIME Type Lookup?: Use MIME Type Lookup when you need Look up MIME by extension or reverse to extension. Use File to Base64 when you need Encode any file as a data URL. They share a category (Developer) but not the same job.
What are the limits of MIME Type Lookup?: Built-in table only. Unknown extensions return nothing. Also: Extension → MIME, or MIME → extension when known. Shows top-level type.