Click the "Select File" button above, and choose your TEC file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert TEC to another file type
To convert TEC data files to another format, you need T-Online Client or other Raster Image software.
Convert a file to TEC
To convert other file formats to the "Renamed Image File" file type, you need software like T-Online Client or a similar tool.
About TEC files
The .TEC file is predominantly a renamed JPEG image file generated by older legacy versions of the T-Online e-mail client. Because the software appended its own proprietary extension, standard operating systems fail to recognize the file as an image. This is a major disadvantage because users cannot open, preview, or share the file on modern devices or web browsers without modification. In specialized fields, a .TEC file acts as a scientific visualization data file for Tecplot, requiring expensive proprietary software to open and analyze fluid dynamics or thermodynamics data. Other rare uses include Engine Control Unit calibration data for Bosch Motorsport and TECkit compiled mapping files from SIL International. Because of these conflicting file types, dealing with .TEC files is highly frustrating. For the vast majority of users dealing with the email attachment variant, you must convert the file to a standard raster image. For web use, convert to WebP or JPG. For archiving documents, convert to .PDF/A.
Convert.Guru analyzes your TEC file, detects the exact format, and lets you read the text inside.
If you want to convert TEC file to TMP, TEMP, CACHE, LOG, BAK, OLD, NEW, PART, DOWNLOAD, CRDOWNLOAD, LOCK or PID, you can use T-Online Client or similar software from the "Renamed Email Image" 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 TEC, try T-Online Client or another comparable tool in the "Renamed Email Image" category.
The TEC Converter Story
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 TEC converter.