Look up common file extensions and identify file types, categories, MIME types, common uses, and related file converter tools.
Extension search:
Enter extensions like .pdf, .jpg, .png, .docx, .xlsx, .csv, .txt, .html, .zip, or .mp4.
Category search:
Search categories like document, image, spreadsheet, text, archive, audio, video, web, code, or data.
MIME type search:
Search terms like application/pdf, image/jpeg, text/csv, or application/zip.
Program search:
Search software names like Word, Excel, Photoshop, browser, text editor, or media player.
A file extension lookup helps identify what kind of file you have, what it is commonly used for, and what tool may open or convert it.
It is useful for file converters, PDF tools, image converters, document tools, text tools, spreadsheets, downloads, attachments, and website file management.
Not always. A file extension is the label at the end of a filename. The actual file format is the structure of the file itself.
Usually no. Renaming a file extension does not truly convert the file. Use a converter tool when you need a real format change.
A MIME type is a standard label used by browsers, servers, and software to identify file content, such as application/pdf or image/jpeg.
Yes. After running a lookup, click the copy button to copy the result.