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RAI file extension

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

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

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

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

✅ SPEFO Stellar Spectra Analysis Data

RAI file is a SPEFO Stellar Spectra Analysis Data. SPEFO is a small program used for processing stellar spectra at the Astronomical Institute of the Academy of Sciences of the Czech Republic in Ondrejov.
Category: Data files
Application: SPEFO
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
RAI aliases:
RAI related links:
RAI related extensions:
SPEFO Differential Spectrum Data

SPEFO Rectified Cleaned Data

SPEFO Equivalent Widths Data

SPEFO Rectified Spectrum Data

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

🚫 The .rai file extension is often given incorrectly!

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

ai, ari, dai, fai, gai, ra, rak, ral, ri, ria, rqi, rwi, rzi, tai

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Adobe Illustrator Drawing
AI Game Data
Dream Aquarium Patch
Alpharel Group IV Bitmap
Real Audio Sound
R-Quest TrueNet Disc Image
CEM+ Rack Configuration Data
RFSCAT Simulator Retrieved Wind Field Data
Atlas Right Track Layout

🔴 Can't open a .rai 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 .rai 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 .rai file extension, write to us!

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