Tecplot license data
File type: Various data file
An ntb file contains license data for Tecplot 360.
It belongs to Tecplot's software licensing system rather than containing a plot or scientific dataset.
File type category:
Various data file
Date updated: October 6, 2026
The ntb file extension is associated with Tecplot 360, interactive plotting and visualization software from Tecplot for analysing engineering and scientific data.
The ntb file stores license data that Tecplot 360 uses to verify the installation and its licensing status. It is a supporting file for the software, not a user-editable project or data-exchange format.
This record applies to the Microsoft Windows version of Tecplot 360. The file is intended to be read by Tecplot software and normally does not need to be opened independently.
Do not open an ntb file manually. The licensed installation of Tecplot 360 reads its license data automatically on Microsoft Windows.
If Tecplot 360 does not recognize the license, use the software's licensing or activation options rather than editing the file with a text editor.
An ntb file cannot be meaningfully converted to another file format because it contains Tecplot license data, not plot or scientific data.
To use the license on another installation, obtain or update the license through Tecplot's licensing process instead of exporting or converting the file.
Software applications that handle other tasks involving ntb files:
Microsoft Windows
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