Extract text from UNK files
To convert your UNK file to another format, you need UVProbe or other Other software.
To convert other file formats to the "Generic Data Container" file type, you need software like UVProbe or a similar tool.
A .unk file is typically a "false" extension assigned to a standard file (like a PDF document, DOCX Word file, or JPG image) when its original format identity is lost. This most commonly occurs during email transfers (specifically via Microsoft Outlook or Microsoft Mail) or incomplete web downloads, where the system defaults to "UNK" (Unknown) instead of the correct extension. In these cases, the file appears unusable because the operating system does not know which application to launch. A secondary, legitimate use case exists in scientific laboratories, where .unk files serve as data containers for Shimadzu UVProbe spectrophotometer software, storing light absorption measurements. For gamers, .unk files may appear as unidentified resources within The Sims 2 modding packages.
Because most .unk files are simply mislabeled standard documents, the most effective solution is to identify the underlying format and convert or rename it. For general users, converting a .unk file to PDF or DOCX ensures the content becomes readable again without requiring technical diagnosis. For Shimadzu users, these files should remain in their native format for analysis within UVProbe.
Convert.Guru analyzes your UNK file, detects the exact format, and lets you read the text inside.
Users also converted UNKNOWN, UKN, JPG, PDF, PPTX, HTML, ZIP, SLDASM, INO and DAT files.
If you want to convert UNK file to TMP, TEMP, CACHE, LOG, BAK, OLD, NEW, PART, DOWNLOAD, CRDOWNLOAD, LOCK or PID, you can use UVProbe or similar software from the "Unknown / Mislabeled File" 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 UNK, try UVProbe or another comparable tool in the "Unknown / Mislabeled File" 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 UNK converter.