All about TDMS_INDEX Files

The TDMS_INDEX file type is primarily associated with DIAdem.

TDMS_INDEX	File extension: TDMS_INDEX
	File type:	Index file

What is a TDMS_INDEX file?

TDMS_INDEX files mostly belong to DIAdem. TDMS_INDEX files hold the Technical Data Management Streaming index used by National Instruments software.
This file stores detailed pointers and metadata for the main TDMS files. It is designed to help DIAdem and similar applications quickly locate data segments and retrieve measurement details. For example:

Indexing: Contains location pointers for data blocks.

Optimization: Speeds up navigation in large TDMS files.

Integration: Works with DIAdem and LabVIEW environments.

FilExt.com note: These files are automatically generated to support efficient data management. For more detailed technical information, visit the National Instruments website.

How to open a TDMS_INDEX file

You need a suitable software like DIAdem to open a TDMS_INDEX file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your TDMS_INDEX file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a TDMS_INDEX file directly in the browser:. Just drag the file onto this browser window and drop it.

Online TDMS_INDEX Text Viewer

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Programs that open and convert TDMS_INDEX files:

DIAdem
See the previous paragraphs to learn more about the main application. TDMS_INDEX files are often referred to as DIAdem data files because this type of file is primarily created or used by this software.
DIAdem
A *.TDMS_INDEX file is an index file created by National Instruments' DIAdem software. It is used to improve the performance of loading and accessing data from very large *.TDMS files (Technical Data Management Streaming). The *.TDMS_INDEX file contains information about the structure and contents of the associated *.TDMS file, allowing DIAdem (and other compatible software like LabVIEW) to quickly locate specific data within the *.TDMS file without having to read the entire file. This is particularly useful when working with extremely large datasets common in data acquisition and analysis applications. This file format is classified as Index File.

Technical Data for TDMS_INDEX File Extension

File classification:

Data

Related files:

tdms, lvm, daq, tdx, tdm, csv, xml

a tdms_index Index file is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with TDMS_INDEX files

Associate the TDMS_INDEX file extension with the correct application.
Update your software that should actually open index files. Because only the current version supports the latest TDMS_INDEX file format. Search, therefore, e.g. on the manufacturer website after an available DIAdem update.
To make sure that your TDMS_INDEX file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
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