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SEGY file extension

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

  • What is the .segy file?
  • What program do I need to open a .segy file?
  • How can the .segy file be opened, edited or printed?
  • How can I convert .segy files to another format?
  • Where can I find the specifications for .segy?
  • Which MIME-type is associated with the .segy extension?

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

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

.segy file extension details

SEG Y Data File

SEG Y Data File .segy file icon
SEGY file is a SEG Y Data File. The SEG Y file format is one of several standards developed by the Society of Exploration Geophysicists for storing geophysical data. It is an open standard, and is controlled by the SEG Technical Standards Committee, a non-profit organization.
Category: Data files
Application: SEGYMAT
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
SEGY aliases:
SEGY related links:
SEGY related extensions:
SEG-2 Data File

SEG-D Data File

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

.segy file extension error

The .segy file extension is often given incorrectly!

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

seg, sgy

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Mail.dat Segment File
SEG-Y Geophysical Data
open .segy file

Can't open a .segy 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 .segy file association, check the FAQ.

.segy file extension

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 .segy file extension, write to us!

.segy file extension

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