CheckFiletype.com helps you determine the true file type of any file based on the content of the file, not the extension. Simply use our online tool to upload the file and we will test it and show you the …

A list of common file extensions and file types that are good to know.

Each format is identified by a capitalized word that is the format's full or abbreviated name. The typical file name extension used for a format is included in parentheses if it differs from the identifier, …

Feb 3, 2026 · You can use the filetype: operator in Google Search to limit results to a specific file type or file extension. For example, filetype:rtf galway will search for RTF files and URLs ending in...

Simple to use Finding your filetype has never been easier, it is simple to use and the results are one click away.

Jul 4, 2025 · text/plain is the default value for textual files. A textual file should be human-readable and must not contain binary data. application/octet-stream is the default value for all other cases. An …

Return Values ¶ Returns the type of the file. Possible values are fifo, char, dir, block, link, file, socket and unknown. Returns false if an error occurs. filetype () will also produce an E_NOTICE message if …

Detect file types by analyzing binary headers. Accurately identify images, videos, documents, and more file formats. Free online tool, no upload to server.

Upload a file to check its format and technical signature. © Filestash, 2026. Terms of Use | Privacy Policy.

Mar 15, 2011 · Learn how a file type describes what kind of data is stored within that file, and is represented using a specific file extension.