| ExtensionGuesserInterface | Guesses the file extension corresponding to a given mime type. |
| MimeTypeGuesserInterface | Guesses the mime type of a file. |
| ExtensionGuesser | A singleton mime type to file extension guesser. |
| FileBinaryMimeTypeGuesser | Guesses the mime type with the binary "file" (only available on *nix). |
| FileinfoMimeTypeGuesser | Guesses the mime type using the PECL extension FileInfo. |
| MimeTypeExtensionGuesser | Provides a best-guess mapping of mime type to file extension. |
| MimeTypeGuesser | A singleton mime type guesser. |
