Extract text from Unidentified files (UNKNOWN)
To convert UNKNOWN Files to another format, you need Operating System Defaults or other Other software.
To convert other file formats to the "Unidentified File" file type, you need software like Operating System Defaults or a similar tool.
An .UNKNOWN file is not a unique file format. It is a placeholder extension assigned by operating systems, web browsers, or messaging apps (like WhatsApp) when they cannot determine the correct file type or MIME type. Usually, these files are actually standard formats like MP4 media containers, MHTML web archives, PDF documents, or ZIP compressed archives.
The primary disadvantage of this placeholder is that your computer does not know which application to launch when you double-click the file. It is completely unusable in its current state. You cannot open, edit, or share it effectively because the operating system relies on the file extension to map the file to the correct software. Discovering the true format normally requires opening the file in a hex editor to manually read the "magic number" in the file header.
Fixing an .UNKNOWN file requires analyzing its internal signature to find out what data it actually contains. Drop your file here to view and convert it securely right in your browser without installing diagnostic tools. We will automatically analyze the file signature. If it is an image, convert to WebP for web optimization. If it is a document, convert to PDF for easy sharing and printing. If it is an audio stream like AAC, convert to MP3 for broad device compatibility.
Convert.Guru analyzes your UNKNOWN file, detects the exact format, and lets you read the text inside.
Users also converted DAT, BIN, VLC, FILE_PHOTO, UNK, AUDIO, PDF, WIZIN, VOICE, JPG, WMP, DAC and ZIP files.
If you want to convert UNKNOWN file to MP3, PDF, JPG, MP4, WAV, TMP, TEMP, CACHE, LOG, BAK, OLD or NEW, you can use Operating System Defaults or similar software from the "Unidentified File Placeholder" category. In the File menu, look for Save As… or Export….
To convert DEVICE, CACHE, SOCK, SYMLINK, PID, MOUNT, FIFO, LOG, PIPE, TMP, JUNCTION or TEMP files to UNKNOWN, try Operating System Defaults or another comparable tool in the "Unidentified File Placeholder" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our UNKNOWN converter.