About this tool
Search a reference of common file extensions to learn what each is for, its category and usual MIME type, all in your browser.
Frequently asked questions
How do I find an extension?
Start typing in the search box; it filters by extension, category, description or MIME type as you go.
Is this list exhaustive?
No, it covers around seventy of the most common extensions across web, documents, media, archives and code.