MIME Type Lookup
Look up common file extensions and MIME types without leaving the page.
Extension ↔ MIME type
Serving a file with the wrong MIME type causes downloads to fail or content to render incorrectly. This lookup maps common file extensions to their MIME types and back, so you can set the right Content-Type or figure out what a type refers to.
Having the mapping instantly saves a search when configuring a server, an upload validator, or a data URI. Enter an extension or a MIME type and get its counterpart, drawn from an embedded reference — no lookup, no network needed.
Correct types, locally
Serving the right MIME type is what stops a file downloading instead of rendering, or the reverse. The lookup runs entirely in your browser.
Frequently Asked Questions
What does the mime type lookup do?
It processes pasted developer text in your browser and writes a usable result to the output panel.
Does this send code or data to a server?
No. The tool runs client-side in your browser and does not upload your input.
What are the limits?
It is designed for everyday snippets, configuration values, and small files rather than huge production datasets.
Is this free?
Yes. It is a free browser utility with no account required.
Practical utilities for everyday web development work.