A daily updated filename extension database!

INDX file extension

The table below provides useful information about the .indx file extension. It answers questions such as:

  • What is the .indx file?
  • What program do I need to open a .indx file?
  • How can the .indx file be opened, edited or printed?
  • How can I convert .indx files to another format?

Table of Contents

We hope you find this page helpful and a valuable resource!

1 extension(s) and 0 alias(es) found in database

✅ CALDB Index

INDX file is a CALDB Index. The HEASARC's calibration database (CALDB) system stores and indexes datasets associated with the calibration of high energy astronomical instrumentation.
Category: Data files
Application: CALDB
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
INDX aliases:
INDX related links:
INDX related extensions:

Other types of files may also use the .indx file extension.

🚫 The .indx file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

idx, incx, ind, indd, inds, insx, inx, ndx

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

VobSub Subtitle Index
InScribe XML Document
SQL Script Indexes
Treepad Database Index
LaTeX Unsorted Index Data
Adobe InDesign Interchange
TINA Library Index
Intuit Quicken Index Data
dBASE Database Index
PCCharge Request XML File

🔴 Can't open a .indx file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .indx file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .indx file extension, write to us!

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