Click the "Select File" button above, and choose your TNS file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert TNS to another file type
To convert TNS documents to another format, you need TI-Nspire Software or other Data software.
Convert a file to TNS
To convert other file formats to the "Calculator Document" file type, you need software like TI-Nspire Software or a similar tool.
About TNS files
A .TNS file is a proprietary document format used by Texas Instruments for their TI-Nspire line of graphing calculators. Students and teachers use these files to store mathematical equations, geometry graphs, spreadsheets, and class notes. The main disadvantage of the .TNS format is its strict vendor lock-in. It is proprietary and cannot be opened natively on Windows, macOS, or mobile browsers. Users are forced to buy or install the bulky TI-Nspire Student Software just to view basic homework assignments. Because it is a closed binary format, sharing these files with people who do not own a Texas Instruments calculator is extremely frustrating. Users typically want to convert .TNS to standard formats like PDF, TXT, or CSV to make the content universally readable. However, standard online converters generally fail to process .TNS files because the internal data structure is deeply undocumented. Explain why this file format is difficult to open or convert: often only the original Texas Instruments software can properly read or export the exact mathematical formatting. If our analysis detects a supported underlying or embedded format, such as a hidden PDF or a plain text block, viewing or conversion may still be possible.
Convert.Guru analyzes your TNS file, detects the exact format, and lets you read the text inside.
If you want to convert TNS file to PDF, TXT, JS, TS, PY, JAVA, CPP, C, CS, PHP, RB or GO, you can use TI-Nspire Software or similar software from the "Graphing Calculator Document" category. In the File menu, look for Save As… or Export….
To convert SH, PY, KT, PS1, SWIFT, LUA, PL, JAVA, SCALA, JS, VBS or TS files to TNS, try TI-Nspire Software or another comparable tool in the "Graphing Calculator Document" category.
The TNS 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 TNS converter.